21、There are forty students in Class 2，Grade 8．The following table shows what the students were doing at 8：30 on Saturday evening．

根据短文和表格所提供的信息，选择正确的答案。

1．Six students were _________．

A．watching TV                                           B．learning English

C．playing football                                          D．playing computer games

2．_________ students were learning English．

A．Four                    B．Six                      C．Ten                       D．Eight

3．A quarter of students were interested in _________．

A．football                B．computer games     C  English                  D．TV

4．The table shows that the fewest students _________．

A．were doing their homework                      B．were playing football

C．were playing computer games                     D．were watching TV

5．The number of the students who were watching TV was _________．

A．the smallest of all                                     B．the largest of all

C．as large as the other four                            D．smaller than that of learning English

20、Many years ago，there were lots of trees on earth，because summer lasted a whole year．What was the forest like? It is not difficult to see，because parts of that ancient（古老的）forest still stand．It is the rainforest．Here，even in a sunny day water drops through the leaves．

Today's largest rainforest is in South America．It covers about a million square miles．All the trees are very tall；the young trees are nearly sixty feet high．But it is not easy for some to grow higher because very little sunlight leaches them．

Many trees are about 60 to 120 feet high．Some are even taller．The tallest trees can be 200 feet high．

In this forest of tall trees，plant life is rich，animal life is rich，too．At different heights live different animals and many different noises can let you know where they are．

根据短文内容，选择最佳答案。

1．There were lots of trees on earth many years ago because of the _________．

A．cold weather          B．largest forest          C．warm weather               D．rainforest

2．A rainforest has enough _________．

A．trees                    B．rainfall（雨量）      C．forest                    D．leaves

3．There is rainforest _________．

A．only in South America                              B．only in the old days

C．in some parts of the world                          D．below the sea

4．Young trees share little sunlight because _________．

A．tall trees are above them                           B．there isn't enough sunlight

C．they needn't much sunlight                          D．it is summer the whole year

5．You can always find different animals by _________．

A．their colors                                             B．the noises they make

C．climbing the trees                                       D．watching them carefully

18、从方框中选择适当的选项补全对话。其中有一项是多余的。

A：Hello! May I speak to Maria，please?

B：This is Maria speaking．__1__

A：This is Michael Maria，could you practice the violin with me?

B：Sorry，I can't．__2__．

A：Do you like robots?

B：__3__ It's one of the most important inventions of the 20th century．

A：They are great．__4__

B：They can do many things．They may take the place of humans in some work situations．

A：1hat sounds good．__5__

B：Yes，I think so．

A：Oh，I see．

17、You _________ smoke when you see the sign ．

A．must             B．should                C．mustn't                  D．needn't

16、--Would you mind _________ a favor?

--Not at all．

A．doing me              B．do I               C．doing my                   D．to do me

15、--I can't go to school today．I have a headache．

-- _________

A．That's OK．                             B．It doesn't matter．

C．I hope not．                                D．I'm sorry to hear that．

14、Mr. Black used to _________ a teacher．But now he is a writer．

A．／          B．is            C．be               D．being

13、I am quite busy．I don't know _________ I will have time or not tonight．

A．if                 B．weather            C．whether               D．when

12、_________ funny story! It makes us laugh again and again．

A．What an                B．What a              C．How                 D．What