These diagrams are especially helpful when we have a concrete problem ________ a
题型：不详难度：来源：
These diagrams are especially helpful when we have a concrete problem ________ at hand.| A．be solved | B．to solve | | C．solved | D．being solved |
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答案
| B |
解析
| B 考察非谓语动词。句义：如果我们手边没有解决的具体问题，你们这些数据就非常有用，have在此表示有，后面接不定式的形式。 |
举一反三
People believe that the China Dream is not very difficult ________ so long as the whole nation works hard for it.| A．realizing | B．to be realizing | | C．realized | D．to realize |
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Curious and ________， I rushed out of my dormitory when I heard the noise of three gunshots.| A．astonishing | B．being astonished | | C．astonished | D．to be astonished |
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To answer a telephone call, the careless woman went out of the kitchen, ________ the soup ________ over the gas.| A．left; cook | B．leaving; being cooked | | C．leaving; cooking | D．left; being cooked |
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Our director is out. I"ll have her ________ you on the matter when she"s back.| A．to contact | B．contacting | | C．contact | D．contacted |
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A small plane crashed into a hillside five miles east of the city, ________ all four people on board.| A．killed | B．to kill | | C．kills | D．killing |
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