题目

1.It was not until December 31 __________ we heard from him.
A.which B.when C.that D.then
2.At one time we had about eighty people here who did nothing but __________into various family history.
A.researched B.research C.researching D.to research
3.— How __________ will you be able to come back from you travel?
— In a couple of weeks,perhaps.
A.fast B.long C.often
4.Your hair needs __________.You’d better have it done tomorrow.
A.cut B.cutting C.to cut D.being cut
D.soon
5.When __________ to dinner at the White Rose Restaurant,he seemed very happy and accepted the invitation.
A.invited B.inviting C.to be invited D.having invited

提问时间：2020-07-21

答案

1强调句.it was that 2nothing but do sth 3根据下面的回答可以知道对方是问去多久,所以要用How long ,How often是问多经常.一般回答是每隔多久才去一次How fast是问速度的4 cut 可表被动态,need to be done /need d...