At the beginning of class, the noise of desks _____ could be heard outside the classroom.

At the beginning of class, the noise of desks _____ could be heard outside the classroom.

#98029

opened and closed

to be opened and closed

being opened and closed

to open and close

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You can never imagine what great difficulty I had ________ his parents.

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finding

of finding

to find

about finding

In history, every great culture had its own ideas of beauty ______ in art and literature.

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expressed

to express

being expressed

to be expressed

      their final medical check, the astronauts boarded their spacecraft．

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Received

Being received

To receive

Having received

 _________ the temperature might drop, coal was prepared for warming.

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To consider

Considered

Considering

To be considered

________ miss the early train, we should start right now.

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So as to not

To not

In order to not

In order not to

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