So far, all of the infected people are thought _______ the flu after direct cont
题型：不详难度：来源：
So far, all of the infected people are thought _______ the flu after direct contact with sick birds.| A．to have caught | B．having caught | C．to catch | D．being caught |
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答案
| A |
解析
试题分析：考查句型：sb/sth is thought to do/to have done…某人/某物据认为正在做…/已经做…,如果不定式的动作是将要发生，用一般式，如果不定式的动作是先于主句的动作发生，用不定式的完成式，句意：到现在为止，所有的感染的人都被认为是在直接和病禽有过接触。选A。 |
举一反三
--How was your weekend, Rose?
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I am not a little tired today after giving the room a thorough cleaning and I have never had ______today.| A．as a tiring day as | B．tiring as a day as | | C．as tiring a day as | D．day as a tiring as |
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We were swimming in the lake _____ suddenly the storm started.| A．when | B．until | C．while | D．before |
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After the new technique was introduced， the factory produced _______ tractors in 1988 as the year before.| A．as twice many | B．as many as | C．as twice as many | D．twice as many |
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