问题

Tom realized that he ________ his physicsbook at home when he reached school．

A:left
B:had left
C:was leaving
D:leaves

正确答案是：

同类题型

Those overseas students volunteer 10 hours each week in Paris ________ free food and accommodation

Students ought _____ the truth.

Students should _____ everything important their teachers give in class.

Would you like ________ tea

There will be ________ factories in 100 years.—Really Where will people work then