---Does ____ of the two foreigners work in Chengdu? ---Yes.____ of them have been working here as English teachers for three years now.
I am wondering ___________ that comes first in the final exam.
Word came ________ a new railway station would be built in our city.
Not until Tom read his composition the second time ________ the spelling mistake.
Parents should encourage their kids to take part in those activities to help them______ their confidence by giving others a hand.
It is obvious that chemical pollution will lead to a threat to agriculture and food chain, which will ________threat human health.