---What are you doing outside the class?Didn't you hear the clock___?---Sorry,sir.I____A strike;didn't noticeB striking;wasn't noticingC is striking;didn't noticeD struck;wasn't notice

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---What are you doing outside the class?Didn't you hear the clock___?---Sorry,sir.I____A strike;didn't noticeB striking;wasn't noticingC is striking;didn't noticeD struck;wasn't notice

---What are you doing outside the class?Didn't you hear the clock___?---Sorry,sir.I____A strike;didn't noticeB striking;wasn't noticingC is striking;didn't noticeD struck;wasn't notice
---What are you doing outside the class?Didn't you hear the clock___?---Sorry,sir.I____
A strike;didn't notice
B striking;wasn't noticing
C is striking;didn't notice
D struck;wasn't notice

---What are you doing outside the class?Didn't you hear the clock___?---Sorry,sir.I____A strike;didn't noticeB striking;wasn't noticingC is striking;didn't noticeD struck;wasn't notice
B hear是感官动词,后面直接跟动词ing形式,表示动作正在进行,当时中正在敲,可以直接选B.

b

B

B

是B
因为hear是一个感官动词,感官动词有2种形式
1.+doing sth.(进行中)
2.+do sth.(整个过程)
根据题意,我们可以知道应该用striking
而之前问的是What are you doing outside the class?,又有一个Didn't,说明这是过去进行时时态,而am的过去式是was,所以选wasn't notic...

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是B
因为hear是一个感官动词,感官动词有2种形式
1.+doing sth.(进行中)
2.+do sth.(整个过程)
根据题意,我们可以知道应该用striking
而之前问的是What are you doing outside the class?,又有一个Didn't,说明这是过去进行时时态,而am的过去式是was,所以选wasn't noticing,选B
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