—Send me an email when you are free, will you?
—________.
| A．I must | B．I will | C．I can | D．I should |
—Where do you think _____ he _____ the computer?
— Sorry. I have no idea.
| A．has ； bought | B．／； bought | C．did ； buy | D．had ； bought |
I know Mr Brown；we _____ to each other at an international conference.
| A．are introduced | B．have been introduced |
| C．were introduced | D．had been introduced |
We _____ with you for the time being.
| A．will stay | B．will be staying | C．would stay | D．have stayed |
—Who sings best in your class?
—Mary _____.
| A．is | B．does | C．do | D．sing |
She _____ her pen in her room now.
| A．finds | B．is finding | C．looks for | D．is looking for |