—Andy works hard．—So he does．He is often seen _____ heavily before his teammates
题型：不详难度：来源：
—Andy works hard．
—So he does．He is often seen _____ heavily before his teammates have even arrived at practice．| A．to be sweated | B．sweated | C．be sweated | D．sweating |
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答案
| D |
解析
| 考查短语 see sb doing 看到某人正在做某事，此句是被看见正在做某事，应是：sb is seen doing 所以选D 。 |
举一反三
The two old sisters, so long, held each other and burst into tears．| A．being separated | B．having been separated | | C．having separated | D．had been separated |
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Lin Yi isn’t what it used to be．The last decade ______ great changes in the city images．| A．witnessed | B．was witnessed | C．has witnessed | D．had witnessed |
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They _____ friends since they met in Shanghai.| A．have made | B．have become | C．have been | D．have turned |
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---You may find the key to the maths problem on page 107.
---Ah, it’s so simple. I wonder why I ________ of that.| A．didn’t think | B．haven’t thought | C．wasn’t thinking | D．hadn’t thought |
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— My colleague felt quite happy because his solution was closer now to ______．
— Congratulations!| A．having adopted | B．be adopted | C．being adopted | D．be adopted |
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