动词填空  (本大题共8分，每小题1分)

小题1:_________ (make) the little baby stop crying, he tried all the ways he could think of.

小题2:-- What’s the noise?

--- Oh, the students ___________ (plan) their autumn trip excitedly.

小题3:The radio says the temperature ___________ (drop) a lot later today.

小题4:The Smith __________ (fly) back to New York three days ago and they will come back in two days.

小题5:I got up early in order __________ (not be) late for school.

小题6:--- Why didn’t she stop him going out?

--- Sorry, but she ___________ (write) a letter and didn’t see him go out.

小题7:Mr Wu told us that light __________ (travel) much faster than sound.

小题8:I can’t understand why such a story made him __________ (laugh) so happily.

某化学小组采用类似制乙酸乙酯的装置(如下图)，以环己醇制备环己烯：

已知：

将12.5 mL环己醇加入试管A中，再加入1 mL浓硫酸，摇      

匀后放入碎瓷片，缓慢加热至反应完全，在试管C内得到环己烯粗品。

①A中碎瓷片的作用是________，导管B除了导气外还具有的作用是________。

②试管C置于冰水浴中的目的是________________________________________。

(2)制备精品

①环己烯粗品中含有环己醇和少量酸性杂质等。先加入Na₂CO₃溶液，振荡、静置、分层，环己烯在________层(填“上”或“下”)，分液后用水洗涤。

②再将环己烯按下图装置蒸馏，冷却水从________口进入(填“g”或“f”)。蒸馏时要加入生石灰，目的是________________________________________。

③实验制得的环己烯精品质量低于理论产量，可能的原因是________。

A．蒸馏时从70 ℃开始收集产品

B．环己醇实际用量多了

C．制备粗品时环己醇随产品一起蒸出