The monkey is ()the ladder.(a,climb up b,climbing up c,climbs up d,climbing on)选哪个,

问题描述:

The monkey is ()the ladder.(a,climb up b,climbing up c,climbs up d,climbing on)选哪个,

b

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正解是B
猴子正在爬*.
用现在进行时,be + doing
爬* climb up the ladder