The manager is talking with his secretary _____ the telephone. They usually keep
题型：不详难度：来源：
The manager is talking with his secretary _____ the telephone. They usually keep in touch _____ telephone.| A．by ;on | B．through; by | C．on; on | D．by ;with |
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答案
| B |
解析
| 考查介词的用法。by当“通过”讲时，其后不加冠词；through当“通过”讲时，其后加冠词。 |
举一反三
He got to the bus station early, _____ missing the first bus .| A．in case of | B．instead of | C．for fear of | D．in search of |
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