27. ---- Do give me a call when you arrive in the city, Henry.
---- I won’t forget. See you later.
---- ____________.
A. Have a nice trip B. With pleasure C. Don’t mention it D. It’s kind of you
26. If it were not for the fact that she _______ play tennis, I would invite her to join us.
A. couldn’t B. shouldn’t C. might not D. can’t
25. The manager, ______his factory’s products were poor in quality, decided to give his workers further training.
A. knowing B. known C. to know D. being known
24. ---- Have you seen Mike these days?
---- Yes. I saw him the day before yesterday. In fact, I ______ him for three years.
A. didn’t see B. haven’t seen C. hadn’t seen D. don’t see
23. She had no idea how it _____ that her husband met with trouble again.
A. came up B. came about C. came out D. came across
22. Talking about buying computers, I prefer a computer less than 8,000 yuan to ______ over the amount.
A. this B. it C. that D. one
第一节:单项填空(共15小题;每小题1分,满分15分)
21. _______ good knowledge of several languages is essential to _____ study of comparative literature because without it one can read books only in translation.
A. A; the B. A; / C. The; the D. /; the
19.(本题12分)有机物A是一种重要化工生产的中间体,其结构简式为:C6H5-CH2CH(OH)COOH
(1)A中含有的官能团有: 、 (填名称)。
(2)A可能具有的化学性质有: (填序号)
①能与H2发生加成反应;②能与在烧碱溶液中发生水解反应;③能与甲酸发生酯化反应;④能金属钠发生反应,且有机物A与反应生成的氢气物质的量之比为1∶1反应;⑤能与Ag(NH3) 2OH溶液发生银镜反应。
(3)写出A分别与乙醇、乙酸发生酯化反应的方程式:
。
(4)在催化剂Pt的作用下,A与H2加成后的生成物的结构简式为 。
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