There are eight tips in Dr. Roger's lecture on sleep, and one of them is:
to bed early unless you think it is necessary.
| A．doesn't go | B．not to go |
| C．don't go | D．not going |
There’s no doubt _________ our team will beat yours.
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He asked _______.
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. Fortunately we had a map, without we would have got lost.
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_______ meet my uncle at the station, I went there by taxi instead of by bus.
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. The result depends on the use we _______ the energy.
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