20．We　　　　 a wonderful party to mark the special occasion in the open air, but it rained heavily then．

　　　 A．could have had　　　　 B．must have had　　　　 C．have had　　　　　　　　 D．didn’t have

19．When he realized the police had seen him, the man ____ the exit as quickly as possible.

　　　 A．made up　　　 　　 B．made for　　　　 C．made out　　　　　 D made off

18．Of the two lectures, the first was by far　　　 , partly because the speaker had such a dynamic style.

　　　 A．the best　　　　　　　　　 B．better　　　　　　　　　　 C．the better　　　　 　 D．much better

17．It must be he that has stolen Mr．Smith’s purse,　　　 ?

　　　 A．hasn’t he　　　 　　 B．isn't he　　　　　 　　　　　　　　　　　　　　　　　 C．mustn’t it　　 　　　 D．isn't it

16．Just use this room for the time being, and we’ll offer you a larger one　　　　 　it becomes available．

　　　 A．as far as　　　　 　 B．unless　　　　 　　 C．as soon as　 　　　　　 D．until

15．We should respect food and think about he people who don't have　　　　 we have here and treat food nicely．

　　　 A．that　　　　　 　　 B．what　　　 　　　　　 C．one　　　　 　　　　　 D．it