问题

ition to the farming they ______ since the1990s, the Smiths have started a small business.

A:have done
B:had been done
C:were doing
D:have beendoing

正确答案是：

同类题型

I still remember the sitting-room _______my mother and I used to sit in the evening

You should study hard. No one can _______ you ________a good future.

It giveshis life a flying start ______ he has gone abroad for further education

下列各句中，没有语病的一句是（）

Do you like salad ______ dinner— No. I like ______.