—Mary was heard ________ just now. What happened?—John was telling a joke.A．to c
题型：不详难度：来源：
—Mary was heard ________ just now. What happened?
—John was telling a joke.| A．to cry | B．laugh | C．to laugh | D．cry |
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答案
| C |
解析
试题分析：在使役动词make, let等及感官动词listen, hear等主动语态中，to要省略，但在被动语态中，to不可以省略。句意：结合语境可知既然是笑话，肯定被听到在笑。由于Mary被听到笑了，是被动语态，后面的to不能省略。选C。 |
举一反三
I often spend a lot of time ________ after class.| A．practicing play | B．to practice playing | C．to practice to play | D．practicing playing |
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—When are you going to get your ears ________?
—I am going to have Ms Li ________ my ears this weekend.| A．pierced; pierce | B．pierced; pierced | | C．piercing; to pierce | D．to pierce; pierced |
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It’s very nice ______ you ______ my parents your best wishes.| A．of ; sending | B．of ; to send | C．for ; sending | D．for ; to send |
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| Plan your time carefully and make sure you have some time ___ what you like every day. |
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