Howuniversecameintobeingisapuz

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How ______ universe came into being is a puzzle to ______ scientists of all generations.
A. the; 不填 B. an; the C. a; 不填 C. 不填；the

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You can hardly imagine the difficulty the woman had _____ her children.

A．brought up

B．bring up

C．bringing up

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The farm as well as its neighbouring hills we once spent so much time _____ on a new look as recently as last year.

A．on has taken

B．has taken

C．on having taken

D．having taken

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Before you decide to leave your job, _______ the effect it will have on your family.

A．consider

B．considering

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I felt it a great honour ______ to speak to you.

A．to ask

B．asking

C．to be asked

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When you’re learning to drive, _______ a good teacher makes a big difference.

A．have

B．having

C．and have

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