【单选题】【消耗次数：1】
视觉悬崖说明了婴儿具有（ ）
①
成人思维
②
距离知觉
③
触觉
④
深度知觉
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①
tried; to be left
②
had tried to; leaving
③
tried to; left
④
had tried; have left
【单选题】
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①
Having stolen
②
Having been stolen
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Stolen
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Stealing
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to solve; being talked about
②
solving; discussing
③
to solve; to talk about
④
solving; being discussed
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①
having lost
②
losing
③
to be lost
④
lost
【单选题】
17.____, the subject was always in my mind.
①
Walking or sleeping
②
Walking or slept
③
Having walked or slept
④
To walk and sleep
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20. The joke told by Tom made us_____, so our maths teacher couldn’t make himself _____.
①
to laugh; hearing
②
laughing, heard
③
laughing; hear
④
laughed; heard
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①
to fix
②
to be fixed
③
fixed
④
fixing
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①
it marked
②
marking
③
marked
④
to mark
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①
to sit; tying
②
sitting; tying
③
seating; tied
④
seated; tied
【单选题】
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①
to have discovered
②
to have been discovered
③
to discover
④
having been discovered