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【判断题】
蔬菜的起源中心是固定不变的,且每种蔬菜一般只有一个起源中心。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】—May I speak to Juliet, please? —Juliet? I’m afraid there is in our company.
A.
such a no girl
B.
such no girl
C.
no such a girl
D.
no such girl
【单选题】------Hey, Emily, I’ve got a used copy of our chemistry textbook for half price. ------ I’m afraid you ____ your money. Yours is the first edition, but we’re supposed to be using the third edition.
A.
had wasted
B.
were wasting
C.
wasted
D.
will waste
【单选题】—Would you like to join us in dancing party in our school tonight? —I'm afraid not. I have _____ appointment with my doctor [ ]
A.
a; the
B.
the; the
C.
a; an
D.
the; an
【单选题】— Shall we go to the station to meet our cousins? — I’ m afraid you _______. They will take a taxi by themselves.
A.
shouldn’t
B.
can’t
C.
mustn’t
D.
needn’t
【简答题】列举电子商务安全要素
【单选题】- Does No.20 bus stop at our school? - _________
A.
I go to school by bus.
B.
I'm afraid not.
C.
You are welcome.
D.
I'll not take No.20 bus
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