It wasn’t until_______that_______to prepare their lessons.

A. did the teacher come in; the students began

B. the teacher came in; the students began

C. did the teacher come in; did the students begin

D. the teacher came in; did the students begin

When the teacher came in, the students pretended _______ the text.

The students pretended_______ attentively when the teacher came in.

    A. to learn            B. learning        C. and learned      D. to be learning

根据句子要求进行句型转换（共5小题;　每小题2分,共10分）

1.The fact that ocean ships can get there surprises many people. （同义句转换）

Many people are ___________  __________ the fact that ocean ships can get there.

2.He doesn't like playing basketball. He doesn't like playing skating. （合并句子）

He likes _________ playing basketball ________ playing skating.

3.It is the earth round? The little boy asked. （合并句子）

The little boy asked ________ the earth ________ round.

4.Whether he will come hasn’t been decided.（同义句转换）

________ hasn’t been decided ________ he will come.

5.The students didn’t stop talking until the teacher came in.（改为倒装句）

________ ________ the teacher came in did the students stop talking.

When the teacher came in, the students pretended _______ the text.

   A. to read                         B. to be reading

   C. to have read                     D. having read