问题

______I used to go mountain—climbing every summer

A:at a time
B:at one time
C:At times
D:At the same time

正确答案是：

同类题型

The two runners are neck and neck; _______ of themcould win the race

You must superior ______ me ______ the skill.[ ]

Which is your favourite drink, juice, water or milk— Thanks, but I’m sorry I like ________ of them. I like coffee most.

Out of the crowded bus _____, who was wearing a pair of dark glasses. [ ]

It’s already 10 o’clock. I wonder how itthat she was two hours late on such a short trip.