问题

Your headmaster would have been happy to give you two days off, if you had gone and explained that your parents ________ ill at the time

A:were
B:had been
C:are
D:would be

正确答案是：

同类题型

I hear the birds _______.

How are you going, buddy—-________. A little busy, though.

Most of my friends use their cars ________for their job

Will this woolen sweater _____ when washed?—Of course not.[ ]

_______,but it is also a great way to lower the number of greenhouse gases in the air.