He is a little bit mysterious these days. Nobody in our company knows exactly.
| A．what he is working on | B．what is he working on |
| C．what did he work on | D．what was he working on |
You ______ worry about their safety．They are old enough to take care of themselves.
| A．mustn’t | B．needn’t | C．can’t | D．wouldn’t |
We should make full use of whatever happens to us．There is always____ to learn from every experience.
| A．nothing | B．anything | C．something | D．everything |
------ Could you please tell me ______?
------ It’s next to the post office.
| A．where is the supermarket | B．where the supermarket is |
| C．where was the supermarket | D．where the supermarket was |
March is _____ month of the year.
| A．three | B．third | C．the three | D．the third |
------ What would you like, sir?
------ Two _____ bread and some coffee, please.
| A．piece | B．pieces | C．piece of | D．pieces of |