52.我们必须每天坚持锻炼身体。

We must __________________ everyday.

51.这只狐狸把蛋糕给吃光了。

The fox ________ the cake.

50.There are ________ ( 数以百计) of students in our school.

49.I can’t finish the work on time ______(没有) your help.

48.Please help ________(你们自己) to some fruit ,girls.

47.______(尽管) it was late, he still went on working

46. It is __________( 干燥的) in autumn than in winter.

45.______ ( 挖) a hole large enough for the tree.

44.The camera cost too much. I can’t ______ (支付) it.

43.What are those ______(小学生) doing?