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【单选题】
The average fixed cost curveA.
a. always declines with increased levels of output.
B.
b. always rises with increased levels of output.
C.
c. declines as long as it is above marginal cost.
D.
d. declines as long as it is below marginal cost.
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举一反三
【单选题】–Do we have to talk with Jack about that matter? –Yes, I think we __________.
A.
can
B.
may
C.
should
D.
could
【单选题】While we were running on the playground, Jack suddenly stopped____ and lay on the ground,so we all stopped_____ what was wrong with him.
A.
to run; to see
B.
running; seeing
C.
running; to see
D.
running; see
【简答题】I feel very s_______ and tired these days, I will have an exam soon.
【简答题】根据首字母,完成句子。 The coming test makes me n_______. And I feel s________.
【单选题】I feel it ’ s a great pleasure to attend your birthday party.
A.
to invite
B.
to be invited
C.
invited
D.
having invited
【单选题】听力原文：M: Do you think we should urge Jack to take part in the game? W: We'll have to leave that decision up to him. Q: What does the woman mean? (13)
A.
Jack should decide about the game himself.
B.
They have to make an urgent decision.
C.
Jack should take her advice.
D.
They can't make a decision.
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