When you’re learning to drive，_____ a good teacher makes a big difference. A．hav
题型：不详难度：来源：
When you’re learning to drive，_____ a good teacher makes a big difference. | A．have | B．having | C．and have | D．and having |
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答案
| B |
解析
| 这是一个含 when引导时间状语从句的主从复合句，having a good teacher在主句中用作主语。 |
举一反三
Anyone _____ bags， boxes， or whatever， was stopped by the police. | A．seen carry | B．seen carrying | | C．saw to carry | D．saw carrying |
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A railway station is no place for a child _____ alone at night. | A．leave | B．leaving | | C．to be leaving | D．to be left |
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_____ on time， this medicine will be quite effective. | A．Taking | B．Being taken | C．Taken | D．Having taken |
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—Just a minute. I’ll have Bob _____ you to your room. | A．show | B．shows | C．to show | D．showing |
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