问题

We’ll carry on the work ______ we can get the machines we needAfter all, it’s the determination that really counts

A:unless
B:before
C:whether
D:while

正确答案是：

同类题型

How long do you think it is ______hetook up the job— Half a year at least.

I haven’t got __________ oranges __________ bananas.

They each other for 5 years

Earth Day is a celebration of life and our planet. It is a reminder that we need to ______ the world we livein and that we should learn to respect life and nature.

o cause people some health problems, infact far more serious _____ than computers do