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【单选题】
I did want a holiday abroad, but I _______ the idea since last month.A.
gave up
B.
have given up
C.
give up
D.
had given up
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举一反三
【单选题】Let's go to the chemist's shop _____ we can get the medicine we need. [ ]
A.
what
B.
where
C.
that
D.
which
【单选题】听力原文：W: Hello, Patrick, is that you? M: Yeah Jane, what can I do for you? W: I was calling about the apple tree that you were trimming yesterday. M: That was hard work! W: I'm sure it was. It sure loo...
A.
He picked up some apples in his yard.
B.
He cut some branches off the apple tree.
C.
He quarreled with his neighbor over the fence.
D.
He cleaned up all the garbage in the woman's yard.
【单选题】Which of the following is the best title for this passage?
A.
Where Can We Get Vitamin D?
B.
Do You Have Enough Vitamin D?
C.
What Are the Functions of Vitamin D?
D.
Can Vitamin D Improve Your Athletic Performance?
【单选题】长期平均成本LAC曲线表示（）
A.
厂商在长期内在每一产量水平上实现的最大的平均成本
B.
厂商在长期内增加一单位产量所引起的最低总成本的增量
C.
厂商在长期内增加一单位产量所引起的最低平均成本的增量
D.
厂商在长期内在每一产量水平上可以实现的最小的平均成本
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