20．The explorer got a disease in blood for the _________ of fresh vegetables and fruit.

　 A．sake　　　　　　　　　　 B．lack　　　　　　　　　　 C．harm　　　　　　　　　 D．benefit

19．You　　　　　　　　 pay your fine speeding．If not, you　　　　　　 not be allowed to take back your license．

A．should; can　 　　　 B．need; shall　　　 C．shall; will　　　　　　 D．can; must

18．We hoped to be able to move into our new house at the end of the month, but things didn’t ___________ as we expected .

　　　 A．work out 　　　　　 B．move out　 　　　　 C．carry out　　　 D．put out

17．The ___________, I think, he drew from his simple experiment is not scientific.

　　 A．attention　　　　　　　 B．conclusion　　　　　 C．promise　　　　　　　 D．relation

16．- How did _________ feel to run 3000 meters at the sports meet?

- Terrible! Especially when I saw I was left so far _________ by the others.

　　　 A．that; alone　　　　　 B．it; alone　　　　　　　 C．that; behind　　 D．it; behind