Question

1.Our history teacher told us that the earth  _________ (be) round.

2.My mother         (cook) in the kitchen when you called her at 6 o’clock this afternoon.

3.They won’t go home until their homework _______ (do).

4. Please knock at the door before _________ (enter) the teachers’ office.

5. ____________ (learn) English well , he practices speaking and reading every day .

Answer

1.is

2.was cooking

3.is done

4.entering

5.To learn

【解析】

试题解析：

1.

2.

3.

4.

5.

考点：完成句子