—Isthereanyvaccine(疫苗)againstH

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更新 2022-09-03
科目英语
题型单选题
难度较易
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—Is there any vaccine(疫苗) against H1N1 flu that can be used on humans?
—No, but scientists are working to develop ________ .

A．that

B．it

C．one

D．so

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A．such, it

B．that, it

C．so,不填

D．that，不填

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It is so difficult a problem that _____ student in this class _____ work it out.

A．any, can't

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.Please make my excuse at tomorrow's meeting. I've got too much work _____.

A．to do to come

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C．to do coming

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Our math teacher, however, _____ speak English well.

A．doing

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We're leaving at six o'clock , and hope _____ most of the journey by lunch time .

A．to do

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