13.Four and half hours of discussion took us up to midnight,and break for cheese,chocolate and tea with sugar. a;a 。 the; the 。 不填；the 。 a;不填 。
8. The watch was very good, and he 20 percent down for it. a good one 。 a better one 。 the best one 。 a best one。
23. Try not to cough more than you can ___ since it may cause problems to your lungs. check 。 allow 。 stop 。 help。
我国公益事业捐赠的原则包括（ ）。 平等原则。 自愿有偿原则。 公益原则。 合法与符合社会公德。 国家鼓励公益事业捐赠。
5.I got to the office earlier that day, the 7:30 train from Paddington
