certainthathisinvertionwilllea

___________ certain that his invertion will lead to the development of production.

A．That’s

B．This is

C．It’s

D．What’s

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He was _________by his colleagues though he himself didn’t think he had done anything special.

A．thought little of	B．thought poorly
C．thought highly of	D．thought highly

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It was reported that a chemical factory________ last night, which killed thirty workers.

A．exploded	B．cracked
C．ruined	D．burst

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The exhibition is well worth ________ and you can see fancy vases of different dynasties on show there.

A．to visit	B．to be visited
C．being visited	D．visiting

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Only when he reached the tea-house _________ it was the same place he’d been in last year.

A．he realized	B．he did realize
C．realized he	D．did he realize

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She’s having a lot of trouble with the new computer, but she doesn’t know whom to _______.

A．turn to	B．look for
C．deal with	D．talk about

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