Between the two periods of classes is a break, _______ we can have a short rest.
A．then B．where C．when D．which
---The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
---____ my students have a try?
A．May B．Must C．Will D．Shall
With all the books he was interested in _______, he left the library and went back to his dorm.
A．borrowed B．borrowing C．to borrow D．borrow
A series of stimulus policies and supportive measures taken by the government _____ to promote change in the economic environment in this area.
A．are expecting B．are expected C．is expecting D．is expected
---Where did you come across our Chinese teacher ?
--- It was in the supermarket ______I purchased mooncakes．
A．that B．which C．where D．when
Our society insists on regular habits, timekeeping and punctuality, and whether we like it or not, ______ we mean to make our way in society, we have to comply ( to act in accordance with a demand, rule, etc.) its demands.
A．whether B．after C．if D．until
