When we went boating on the lake that morning, it turned out fine, ________, very calm, without any wind.

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All the players came to the sports field at 7:30 and ________.

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A．then the game begin

B．then did the game begin

C．then began the game

D．began then the game

Many people enjoy reading to get ________ knowledge or skills, but not so all ________ time. Sometimes reading is just for ________ fun.

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－He seems to be a doctor.

－________. It is 10 years since he became a doctor.

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Not only ________ hard but ________ also kind.

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－Is John coming by train?

－He should, but he ________ not. He likes driving his car.

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Let Harry play with your toys as well, Clare-you must learn to ________.

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________ forever are the days when we used foreign oil.

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Mr Jones decided to devote all he had to ________some schools for poor children.

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－Are you going to attend the lecture?

－I'm not sure. I ________ go to the lab instead.

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