The students were ________ over the ________ problem，listening to the teacher wi
题型：不详难度：来源：
The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.| A．puzzled；puzzling；puzzling | B．puzzled；puzzling；puzzled | | C．puzzling；puzzling；puzzled | D．puzzling；puzzled；puzzling |
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答案
| B |
解析
| 形容词辨析。Puzzled感到困惑的,通常形容人；puzzling令人困惑的，通常形容事物；expression表情，它与人有关，所以仍然用puzzled修饰。句意：带着困惑的表情听老师讲课，学生们对于那个令人困惑的问题感觉很困惑。 |
举一反三
—Will you be this afternoon, John?
—I am afraid not. I have an appointment with my dentist.| A．convenient | B．suitable | C．accurate | D．Available |
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She is very ______ about her ugly appearance, so you shouldn’t stare at her.| A．sensible | B．sensitive | C．suitable | D．acceptable |
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______ in diving suits, they walk around in this magic world, lighted by the lamps of the ship.| A．Dressing | B．Dressed | C．To dress | D．Being dressed |
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Cycling is highly _____ to people’s health and the environment.| A．fashionable | B．beneficial | C．changeable | D．suitable |
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The passer-by jumped into the cold water to save the _____ boy, who cried for help, but it was too late and the boy was _______ at last.| A．drowning; drowned | B．drowned; drowning | | C．drowning; drowning | D．drowned; drowned |
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