Don’t ________ your exams. They are very easy.
| A．worry | B．worried about | C．worry about | D．be worried |
---Do you think people can live on the moon one day?
---May be. However, it may take ________ years to make it.
| A．thousand of | B．thousand |
| C．thousands of | D．two thousand of |
Ask your brother to call me if he ______ back tomorrow.
| A．will come | B．is come | C．coming | D．Comes |
--Would you please tell me________this DV?
--Yes.It’s very easy.
| A．where to use | B．how to use |
| C．when to use | D．what to use |
Jack’s mother wondered_________.
| A．how much he cost the computer |
| B．how much he paid for the computer |
| C．how much the computer will cost him |
| D．how much did he spend on the computer |