第4题: [单项选择]One of the guards ______ when the general came in, which made him very angry. A. has slept B. were sleeping C. slept D. was sleeping 参考答案:D 答案解析:[解析] 本题测试过去进行时的用法。本句的意思是:“当将军进来的时候,其中一个守卫正在睡觉。这让将军非常生气。”general:将军; guard:守卫。本句应该用过去进行时,因此D为正确答案。
第30题: [单项选择]结合水表外壳距墙为()。 A. 10--20mm B. 10--30mm C. 10--40mm D. 10--50mm 参考答案:B
第31题: [单项选择]Even if he himself ______ tomorrow, it ______ too late to do anything. A. will come... is B. should come... were C. comes... will be D. comes... would be 参考答案:C 答案解析:在条件句中表示将来的时间,需要用一般现在时,主句中使用将来时。