Only when you have acquired a good knowledge of grammar ______ write correctly.

单选题

Only when you have acquired a good knowledge of grammar ______ write correctly.

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单选题

If you are the stand-on vessel in a crossing situation, you may take action to avoid collision by your maneuver alone. When may this action be taken?A. At any time you feel it is appropriateB. Only when you have reached extremisC. When you determine that your present course will cross ahead of the other vesselD. When it becomes apparent to you that the give-way vessel is not taking appropriate action

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单选题

Do you need friends? I‘m sure your answer is “of course. Everybody does!” You need friends when you play and when you work. If you have friends, you will feel happy. If you have no friends, you will feel lonely. Do you know how to make friends? There is only one good way — You make friends by being friendly. A friendly person is interested in other people. He is always helpful. If you want to make friends with a new classmate, you can talk with him, tell him about the other classmates in your c

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单选题

The sentence” Cats have nine lives, but you have only one” implies that ___.

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单选题

When you read the book, you’d better make a mark___you have some questions. (2.0)

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