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【单选题】
I got up early that morning, but I _____ so because I had no work to do.A.
mustn’t have done
B.
didn’t need to do
C.
needn’t have done
D.
can’t have done
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反馈参考答案：
举一反三
【单选题】下列叙述中与环丙沙星不符的是
A.
属第三代喹诺酮类
B.
盐酸盐可溶于水，在乙醇中极微溶解
C.
稳定性好，室温保存5年未见异常
D.
结构中的哌嗪环上带有甲基
E.
90℃加热或1%.溶液用强光照12小时可检出哌嗪环开环和脱羧产物
【简答题】I have to delay _________ the letter.
【简答题】A few days ago, I got a letter from a student. In his letter, he told me, “I have this friend at school. She’s one of my good friends but lately she has been __ _36_ _ strange. When I talked to her th...
【简答题】I'll write back as soon as I __________your letter.
【单选题】一Do you know where I can post the letter? 一 ___________________
A.
I put the letter on your desk in the office.
B.
What letters do you post?
C.
There's a post office at the end of St. Beach.
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