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Scientists are convinced _____ the positive effect of laughter _____ physical and mental health.

A．of; at

B．by; in

C．of; on

D．on; at

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Playing football and watching TV _____ both interesting.

A．were

B．was

C．are

D．is

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---Is anything _____?
---I can’t decide which dress I should wear at my friend’s wedding party.
---I don’t think it ____.

A．the matter; the matter	B．matter; matters
C．the matter; matters	D．matter; the matter

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Mr Smith, _____of the_________speech, started to read a novel.

A．tired; boring

B．tiring; bored

C．tired; bored

D．tiring; boring

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The pen I____ I _____is on my desk, right under my nose.

A．think; lost	B．thought; had lost
C．think; had lost	D．thought; have lost

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The traveler didn’t know_________which direction to go.

A．in

B．at

C．to

D．/

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