To swim properly, a course of instruction is necessary.
错
举一反三
- 中国大学MOOC: To swim properly, a course of instruction is necessary.
- It's usually necessary for you to dress properly for a formal dinner party.
- The freight forwarder would prepare all necessary documents for exporter if necessary．
- All the risks should be calculated in advance.This is necessary.可改写为：It is necessary that all the risks should be calculated in advance.
- Column headings of a table consist of headings that identify the items listed in the columns below them, subheadings as necessary, and units of measurement as necessary.
内容
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I like ，but I don't like now． A: swimming；to swim B: swim; swim C: to swim; swimming D: to swim; swim
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【单选题】__________ after a big meal. It’s not good for your health. A. Swim B. Don’t swim C. Do swim D. Don’t to swim A. Swim B. Don’t swim C. Do swim D. Don’t to swim
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I really don't know ____ . A: to swim B: how to swim C: to swim how D: how swim
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I like______ , but I don't like______ now. A: swimming, to swim B: to swim, to swim C: to swim, swimming
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They can swim.改为一般疑问句。 A: Do they swim? B: They swim? C: Did they swim? D: Can they swim?