問題補(bǔ)充：
單選題
The problem ______ many children,especially girls,have ______ school is getting more and more serious.A.which;got out ofB.that;dropped out ofC.that;fallen out ofD.which;run out of
網(wǎng)友答案：
熱心網(wǎng)友 1樓
B解析第一空需要引導(dǎo)同位語從句的詞，而which不可引導(dǎo)同位語從句。故排除A、D兩項(xiàng)。drop out of school意為“輟學(xué)”，故選B項(xiàng)。
