________ repeatedly, the problem still appeared in the beginners' homework.
A.Explaining
B.Having explained
C.Having been explained
D.To be explained
试卷相关题目
- 1If law and order as well as rules and regulations ______, neither the citizen nor his property is safe.
A.are not observed
B.is not observed
C.were not observed
D.was not observed
开始考试点击查看答案 - 2I ______ in Paris for many years, but I have never regretted my final decision to move back to Chin
A.A.have lived
B.lived
C.was living
D.had lived
开始考试点击查看答案 - 3It _________for the whole week. The city will be flooded if it __________soon.
A.rained; won't stop
B.has been raining; doesn't stop
C.has rained; won't stop
D.rained; doesn't stop
开始考试点击查看答案 - 4The new tax would force companies to __________energy-saving measures.
A.adapt
B.adopt
C.adjust
D.address
开始考试点击查看答案 - 5You'd better not ring me up between 9 and 10. I________ an important meeting then” Dr. Lee said.
A.have
B.had
C.was having
D.will be having
开始考试点击查看答案 - 6He couldn't stand the noise made by the factory, so he wrote a letter to the newspaper to _________ about it.
A.introduce
B.quarrel
C.care
D.complain
开始考试点击查看答案 - 7The boy _________hot on the forehead. He must be sent to the hospital at once.
A.is felt
B.felt
C.feels
D.was felt
开始考试点击查看答案 - 8How long have you ______ ?
A.lost your job
B.been out of work
C.been lost your job
D.out of work
开始考试点击查看答案 - 9-----You shouldn't have gone there alone last night . -----But I ______. Philip went there together with me .
A.didn't
B.hadn't
C.wouldn't
D.wasn't
开始考试点击查看答案 - 10—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
开始考试点击查看答案