The father stayed up late, ______ a long letter to his son.
A.to write | B.writing | C.wrote | D.was writing |
Nuclear science should be developed to benefit the people _____ harm them.
A.better than | B.more than | C.other than | D.rather than |
It is a great pleasure for a woman to ________ the price while shopping.
A.cut in | B.cut down | C.cut off | D.cut up |
. ______ the ancient Egyptians built the pyramids puzzled people for centuries.
A.Whether | B.What | C.How | D.Where |
No one but the experts in this field can _____ the difference between them.
A.recognize | B.speak | C.spot | D.predict |
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A.can; must | B.can; may | C.must; can | D.may; must |