________ they become dirty, the lakes are not able to clean themselves
发布时间:2021-08-17
A.Once
B.Since
C.As
D.Because
试卷相关题目
- 1They ______us by two to one in the game yesterday.
A.beat
B.defeat
C.gained
D.won
开始考试点击查看答案 - 2Studying alone, you are free to choose what to learn and when, _______ you don't need others' agreement.
A.while
B.if
C.though
D.as
开始考试点击查看答案 - 3As you can see, we need the equipments, ___________ are necessary to make the project move on.
A.all of which
B.all of them
C.all that
D.all what
开始考试点击查看答案 - 4Most of us would rather send e-mail as it has _____ of the troubles of sending letters via the post office.
A.nothing
B.none
C.some
D.either
开始考试点击查看答案 - 5 ______ he came to study in the university, he has made much progress in the study of English.
A.While
B.When
C.Since
D.After
开始考试点击查看答案 - 6A completely new situation will _________ when the examination system comes into existence.
A.rise
B.arise
C.arouse
D.raise
开始考试点击查看答案 - 7The economic impact study was conducted by a group of _______ selected MBA students at the University of Kansas.
A.especially
B.specially
C.regularly
D.potentially
开始考试点击查看答案 - 8She dislikes this skirt, ________ ?
A.doesn't she
B.does she
C.isn't she
D.is she
开始考试点击查看答案 - 9You should pay a lot of attention to children's ideas; sometimes they ______ be really creative.
A.must
B.can
C.need
D.should
开始考试点击查看答案 - 10The headmaster will _______ a speech to the visiting foreign guests this afternoon.
A.deliver
B.address
C.announce
D.declare
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