问题

With his attention________on his mobile phone，he didn’t notice his headteacher’s appearance

A:Once
B:As
C:Before
D:After

正确答案是：

同类题型

My teacher punished me this morning.—Why? ______ I know, you’ve done nothing wrong,

______, is there a famous place I can travel in your hometown— Certainly. You can visit Mount Huang.

Nowair pollution.

_______ do you go skating

Considering the fact that we are short of money, we’ll buy this mini car, although it is .