四六级考试

【单选题】 Only when (it started) to rain (he noticed) that he (had left) his raincoat (somewhere).
A．it started
B．he noticed
C．had left
D．somewhere

网考网参考答案：B
网考网解析：
应改为did he notice，因为Only放在句首，所以句子要倒装。 查看试题解析出处>>