I've bought a ________ box, which is very cheap．

A．blue plastic pencil

B．plastic blue pencil

C．blue pencil plastic

D．plastic pencil blue

－Someone is knocking at the door．

－I ________ who it is．

A．am going to see

B．will look at

C．will see

D．am going to look at

________ on facts, the report should be reliable(可靠的)．

A．Based

B．Basing

C．To be based

D．To base

It was raining hard at that time．________, we had to leave as soon as possible．

A．However

B．Until

C．But

D．While

Children are usually mean．________ they take much, they won't give．

A．Even so

B．Even if

C．Since

D．But

________ you climb, ________ you are able to see．

A．The more; the more

B．The higher; the more

C．The more; the farther

D．The higher; the farther

________ he arrived at the station, the train had already left．

A．As

B．While

C．When

D．After

The fisherman made it a ________ to cast his net four times a day．

A．rule

B．ruler

C．law

D．record

What he suggested ________ a good suggestion．Let's put it into practice．

A．looks like

B．smells like

C．feels like

D．sounds like

The number of people invited ________ fifty, but a number of them ________ absent for different reasons．

A．were; was

B．was; was

C．was; were

D．were; were