( ).The kids were playing in the garden _____it suddenly began to rain.A.while B.as C.when D.after这该选什么?为什么?我在犹豫while 是否该理解为 然而 ,如果不行

问题描述:

( ).The kids were playing in the garden _____it suddenly began to rain.A.while B.as C.when D.after
这该选什么?为什么?我在犹豫while 是否该理解为 然而 ,如果不行