—Please go on with your demonstration．—But where was I?—Well, you_____the two ch
题型：不详难度：来源：
—Please go on with your demonstration．
—But where was I?
—Well, you_____the two chemicals together．| A．tried to mix | B．were trying to mix | | C．were trying mixed | D．had tried to mix |
|
答案
| B |
解析
根据句意是：--请继续你的演示。---到哪儿啦？---你想把两种化学物质混合起来。说明是刚才正在做…,用过去进行时。选B。 |
举一反三
Some people claim the rumor that some Egyptians are planning a 100,000 people anti-government protest．| A．to overhear | B．to have overheard | | C．having overheard | D．to be overheard |
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I was standing atop a North Carolina mountain, the afternoon sun______like golden lace through the trees．| A．threaded | B．threading | C．being threaded | D．was threaded |
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Some people believe that they would be better off more adaptive activities in their leisure time, such as establishing relationships and teaching their children．| A．doing | B．to do | C．having done | D．to be doing |
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| In order to know those who really need help as well as how to help them, ________ to help others. |
This is probably the only way we can imagine ________ the current economic problems in Europe.| A．solving | B．to solve | C．solved | D．solve |
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