It is well-known that proper amounts of exercises, if _______ regularly, will benefit our health.
| A．being carried out | B．carrying out |
| C．carried out | D．to carry out |
You can take away _________ you like most.
| A．whatever | B．whichever | C．no matter what | D．no matter which |
I’ll appreciate _______ if you do me the favor to send this message to Mr. Allen.
| A．that | B．it | C．this | D．you |
--- You promised to call me last night.
--- I called, but I just couldn’t _______.
| A．get through | B．get across | C．get down | D．get around |
Even if you are an experienced teacher , you sometimes _____ make some mistakes.
| A．can | B．must | C．should | D．will |
-----An ant has two stomachs --- one for itself, one for others.
-----Really? Quite interesting. I ____ anything about it.
| A．don’t know | B．have known | C．haven’t known | D．didn’t know |