We’d better go downstairs right now for lunch—__________ They serve food 24 hours a day

a very hard-working student.— ______. As far as I know, he often burns the midnight oil.

You’d better not always look up the new words the dictionary while reading. Sometimes we need to guess.

We are so tired. Let’s stop _____ a rest.

Now the number of Chinese people working in Africa_________ more than one million.