题目内容
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[单选题]
They have to study a lot,____.
A.don't they
B.haven't they
C.did they
D.hadn't they
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.don't they
B.haven't they
C.did they
D.hadn't they
如果结果不匹配，请 联系老师 获取答案
更多“They have to study a lot,____.”相关的问题
A.will be studying
B.study
C.will have studied
D.will study
When you study in the United States, usually you have to buy your own health().
A、insurance
B、expense
C、evidence
D、payment
A、studying
B、to study
C、to have studied
D、having studied
A、insurance
B、expense
C、evidence
D、payment
Johan's score on the test is the highest in the group; he ______ last night.
A．should have studied
B．must have studied
C．has studied
D．should study
A、has passed
B、are passing
C、have passed
D、will pass
B.to be hearing
C.to hear
D.to have heard
A. interfere with
B.catch up with
C.do business with
D.put up with
Which of the following may NOT have much influence on economics？
A．A particular religious belief.
B．A firm"s decisions.
C．Weather conditions.
D．The study of literature.
Critics of Wallerstein's study ______.
A．think the number of families studied was too small
B．think that all the factors were considered
C．think that divorce is not painful
D．think that healthy families do not have problems
What was the main finding of the study？
A．The warming of the world's oceans is not a threat.
B．That not enough is being done about global warming.
C．There is a puzzling gap between the model and observations.
D．Ocean waters have warmed faster than scientists had previously thought.
