—Who ________ it be that is knocking at the door?
—It________ be Mother, but I’m not sure.
A.can; must | B.can; may | C.must; can | D.may; must |
There is a 20 minute parking _____ here, so we must get back to the car very quickly.
A.freedom | B.limit | C.allowance | D.prohibition |
Because of the poor harvest, wheat prices have _____ in the last six months.
A.added | B.jumped | C.amounted | D.developed |
I can't advise you what to do. You must use your own _____.
A.opinion | B.guesswork | C.justice | D.judgment |
We won't know whether it will be successful. We won't know whether there will be good _____.
A.ends | B.results | C.effects | D.causes |
The government placed _____ on the numbers of foreign cars that could be imported.
A.limitations | B.restraint |
C.requirements | D.restrictions |