Ithinkitwillbedifficultarobott

I think it will be difficult ______ a robot _____ the same things as a person.

A．as; to do	B．for; to do
C．for; doing	D．as; doing

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---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.

A．can’t	B．mustn’t
C．couldn’t	D．may not

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Lucy had few close friends. So she didn’t know ________ about the trouble.

A．who to talk	B．who to talk to
C．who to say	D．what to talk

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Her singing lessons her five hours a week．

A．take

B．spend

C．cost

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A．keep

B．buy

C．bought

D．Had

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----How can I improve(提高) my listening skills?
-----_______________more.

A．Listen	B．Listening
C．To listen	D．By listening

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