I think our spacecraft(宇宙飞船）is _____slow_____carry large numbers of people to Mars at present.

Did you know any Chinese before you arrived inBeijing— Never ________ it, actually.

do you play basketball this term—Twice a week.

The cost of living in Chengdu is among the lowest inChina, ________ the quality of life is probably one of the highest.

She can play piano and he can play basketball.