问题

When he is free, he often helps his parents ________ some housework.

A:has been on
B:has begun
C:began
D:was on;

正确答案是：

同类题型

My aunt ________ be at home now， for she left for France this morning. She won’t be back ________ next month.

Few pleasures can equal ______ of a cool drinkon a hot day

Are these your English books— Yes, ________.

I am tired these days. What should I do, Mum—Have a good rest, eat more ______ and do more ______.

The knee is the joint ____ the thigh bone meets the 1arge bone of the lower leg[ ]