问题
Do you often help your mother_____ housework at weekends?[ ]
A: with
B: in
C: on
D:by
B: in
C: on
D:by
正确答案是：
同类题型
You can study the grammar _____ memorizing it.[ ]
Food safety is important. Rules _____ to stop people from food pollution.
________ yogurt do you need?-Three cups.[ ]
I have _____ book. It’s ______ English book.
The dish looked bad, but it_______ OK. — So it’s not right to judge a man by his appearance.