20．Much to my surprise, the eight-year-old boy　　　　 fixed my computer within ten minutes．

A．skillfully　　 B．immediately　　 C．normally　　 D．nervously

19．-Why didn't you attend the party　　　 in the hall the other day?

　　 -I just wanted some quiet time by myself．

A．held　　 B．being held　　 C．to be held　 　D．holding

18．US President Barack Obama is expecting the economy to show some　　 of recovery．

A．attempts　　 B．signs　　 C．contents　 D．waves

17．-I've seen very little of Mary recently．How is she going?

　　 -She was happier than she　　　 when I saw her the other day．

A．is　　 B．was　　 C．has been　 D．had been

16．A good teacher is　　 who is always doing things for the good of the students．

A．that　　 B．those　　 C．the one　 D．one

15．-Do you really believe him? He often changes his mind．

　　 -But this time，it seems he　　 to go．

A．will decide　　 B．has decided　　 C．decides　 D．decided