The zoo keeper is worried because the number of visitors__smaller and smaller. A is becoming
The zoo keeper is worried because the number of visitors__smaller and smaller. A is becoming
b,become
c.became
d.have become
具体说明啊
b,become
c.became
d.have become
具体说明啊
英语人气：781 ℃时间：2019-10-19 19:21:20
优质解答
选A 正在一直变得越来越少,所以用进行时
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