.To improve your health, you can _________ 25— 30 minutes three or four times a week to do simple things such as walking ,cycling or running .
| A．give off | B．turn down | C．take over | D．set aside |
—Excuse me, Mr. Brown. ______ you speak Chinese?
—Yes, butt only a little.
| A．Shall | B．Must | C．May | D．Can |
Either she ______ he is fit for the job, but not me.
| A．and | B．but | C．or | D．so |
Most of us found ______ difficult to finish the work in such a short time.
| A．this | B．which | C．what | D．it |
—Do you know where Mary is?
—No, I don’t. I ______ her since last Sunday night.
| A．haven’t seen | B．didn’t see | C．won’t see | D．don’t see |
You still go to the gym every day, ______ you?
| A．do | B．don’t | C．are | D．aren’t |