Thefluisbelievedbyvirusesthatl

The flu is believed _______ by viruses that like to reproduce in the cells inside the human
nose and throat.

A．causing

B．being caused

C．to be caused

D．to have caused

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相关试题

At the Olympic Games, only the athletes who have reached the agreed standard for their event will be ______ as competitors.

A．deserted	B．discussed
C．admitted	D．advertised

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The scientist went to draw some money in the bank in a rush, only that he failed to take the ID card.

A．finding	B．to find
C．found	D．having found

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—Where did you come across your old classmate Jane?
—It was in the supermarket _________ she worked _________ I came across her.

A．where; when	B．that; when
C．that; that	D．where; that

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In the lecture, little Tom kept silent all the time unless _________ to express his opinion.

A．he invited	B．he is invited
C．invited	D．being invited

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— How do you like the new book?
—To be honest, it is a little difficult________.

A．understood	B．being understood
C．understanding	D．to understand

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