问题

The shepherd had to round up the sheep ________ first night fell.[ ]

A: until
B: before
C: after
D: till

正确答案是：

同类题型

1The red socks $4.

his winter vacation Chinese went to Japan, but only were from Chongqing.

Without electronic computers，much of today’s__________advanced technology.

Not until I was questioned by the teacher how much time I had wasted.

______ you keep trying till the end, you will never know how strong you are!