单项选择题

（）such a good chance, he planned to learn more.

A．To be given
B．Having been given
C．Having given
D．Giving

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单项选择题
（）that they may eventually reduce the amount of labor needed on construction sites.

A．So clever are the construction robots
B．So clever the construction robots are
C．Such construction robots are clever
D．Such clever construction robots are
单项选择题
It is recommended the project（）until all the preparations have been made.

A．is not started
B．will not be started
C．not be started
D．is not to be started
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