—Therearen’tanytoysinoursuitca

—There aren’t any toys in our suitcase．Where have you put them?
—Oh, no．That old lady sitting next to us ______ have taken ours by mistake.

A．must

B．could

C．should

D．would

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C．neither eat nor drink	D．both eat and drink

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A．improved	B．to improve
C．improves	D．improving

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A．highly; low	B．low; high
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A．A lot of	B．A number of
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A．can do

B．can to

C．can to do

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