【单选题】【消耗次数：1】
3. He ______ hard until I told him to sit down and have a break.
①
was working
②
had been working
③
worked
④
has worked
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相关题目
【单选题】
Had he worked hard, he _____ the exams.
①
must have got through
②
would have got through
③
would get through
④
could get through
【单选题】
If he had worked harder, he ___.
①
would succeed
②
had succeeded
③
should succeed
④
would have succeeded
【单选题】
They are working hard to____ what they have lost.
①
make out for
②
keep up with
③
catch up with
④
make up for
【单选题】
The boy worked hard ______ he could get the prize.
①
so that
②
so as to
③
so as
④
in order to
【单选题】
He____________ working as if nothing had happened.
①
continue
②
continues
③
continuing
④
continued
【判断题】
Before he began to study in the university, he had worked in a company for three years.
①
正确
②
错误
【单选题】
Tom is hard-working, so its _____________ that he won the match.
①
no wonder
②
a pity
③
a surprise
④
a mystery
【单选题】
When I worked as the general manager of the firm, I sometimes had ___ to visit London on business.
①
opportunity
②
possibility
③
occasion
④
chance
随机题目
【多选题】
各级气象主管机构所属的气象台站、其他有关部门所属的气象台站和与灾害性天气监测、预报有关的单位应当根据气象灾害防御的需要，按照职责开展灾害性天气的监测工作，并及时向气象主管机构和有关灾害防御、救助部门提供（）等监测信息。
①
雨情
②
水情
③
风情
④
旱情
【单选题】
人们现在非常关注南极出现的臭氧空洞，是因为（）
①
臭氧浓度减弱，将使到达地面的红外线减少
②
臭氧浓度减弱，将使到达地面的红外线增加
③
臭氧浓度减弱，将使到达地面的紫外线减少
④
臭氧浓度减弱，将使到达地面的紫外线增加
【单选题】
露是因夜间地面和地面上物体表面辐射冷却，使贴近地面或物体表面的空气温度下降到（）以下时，在地面或物体表面上所产生的凝结物。
①
零度
②
一定温度
③
露点温度
④
地面温度
【单选题】
大气中臭氧主要集中在（）。
①
散逸层，因该层紫外线辐射强，O与O2易合成O3
②
平流层，因该层紫外线辐射强，易形成O3
③
对流层，因该层温度低，O3不易分解
④
近地层，因该层温度高，O与O2易合成O3