--- What are you going to do this weekend?--- If time permits, I may go to Shanghai with my friends.(2012 .福建)
I’d like to study law at university __________ my cousin prefers geography.
Some students often listen to music _____ classes to refresh themselves.
.—____ when has the country been open to international trade? —1978, I suppose.
I think he is taking an active part in social work. I agree with you ______ .
Experts have been warning _____ of the health risks caused by passive smoking.