The study of natural history is not something to be left to biologists. In fact, their capacity __________ the time they can spend away from their offices is very limited.
Time waits for no man. But teenagers won’t realize the value of time until it’s gone. Don’t waste your time, __________ you will regret it.
Rather than at home alone, Little Tom go to the cinema that day.
More and more foreign students come to China to learn________ Chinese language.
In order to catch up with her classmates, _____.
—Do remember to watch out for cars while crossing the street. —_____.