问题

My father walked _____ in the room, looking as if he was thinking over something.

A:now and then
B:up and down
C:again and again
D:over and over

正确答案是：

同类题型

We couldn’t wait _______ a good rest afterthe exam.

_____ with so much trouble,I am afraid, they will fail to complete the task on time [ ]

What do you want to _________ yournew dog, Lucy—Snow White. It’s the best name for herbecause she is beautiful and white.

Why do you look down, Jack— Everyone __________ me got an invitation to Lucy’s party.

When did you become a volunteer — I ________in this group since 2008.