-----Is this the first time you______ Chengdu?-----No. But the first time I_____
题型：不详难度：来源：
-----Is this the first time you______ Chengdu?
-----No. But the first time I______ here, the city wasn’t so beautiful| A．visited; came | B．visited; have come | | C．have visited ; have come | D．have visited; came |
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答案
| D |
解析
| 考察时态。第一空是固定句型，this is the first time后面的句中使用现在完成时。第二空是指第一次我到那里的时候，是一个过去的时间，故使用过去时。故D正确。 |
举一反三
They waited at the bus stop and about five minutes later the bus they wanted along.| A．coming | B．came | C．to come | D．had come |
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| She down beside me and soon got into sleep. |
At this time tomorrow ______ over the Atlantic. | A．we’re going to fly | B．we’ll fly | | C．we’ll be flying | D．we’re to fly |
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Scientists have many theories about how the universe_____.| A．came into being | B．was coming into being | | C．had come into being | D．would come into being |
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--Why does the river smell terrible?
--Because large quantities of water__________.| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
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