---How can you keep slim as a mother of two sons?---I _______ in the gym for yea
题型：不详难度：来源：
---How can you keep slim as a mother of two sons?
---I _______ in the gym for years.| A．have worked out | B．have been working out | | C．have worked on | D．have been working on |
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答案
| B |
解析
| 句意：作为两个儿子的母亲你怎么能保持这么苗条？我这些年一直在体育馆锻炼。Work out锻炼，work on从事；. have been working out现在完成进行时，表示从过去一直到现在进行的动作，有可能还会进行下去。所以选B。 |
举一反三
In this country, coal electricity.| A．is used to produce | B．is used to produced | | C．is used to producing | D．used to produce |
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It was required that the tall building _______ at present because it is still new. | A．not pulled down | B．was not pulled down | | C．not being pulled down | D．not be pulled down |
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—I’d like a pen which _________ well.
—Will this one _________?| A．is written；work | B．writes; work | C．is written; do | D．writes; do |
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----Do you know our hometown at all?
----No, this is the first time I _____ here. | A．was | B．have been | C．came | D．am coming |
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The price ________, but I doubt whether it will remain so.| A．went down | B．will go down | C．has gone down | D．was going down |
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