专升本考试

【单选题】 The police ______ for the thief everywhere when he suddenly appeared in a theatre.
A．search
B．have searched
C．were searching
D．are searching

网考网参考答案：C
网考网解析：
[解题指要] 句式“进行时+when+一般时”表示“正在做某事，就在这时……”。例如： We were swimming in the river when it began to rain．与此类似，应选C。 查看试题解析出处>>