31．--- Was his father strict with him when he was at school ?

　 --- Yes． He had never praised him __________ he became one of the top students in his grade．

　 A． after　　　 　　 B． unless　　　　 　　 C． until　　　　 D． when

30． Every minute should be made use of________ for the coming exam．

　 A． preparing　　 　 B． to prepare　　 　　　 C． prepared　　 　　　 D． prepares

29．---English has a large vocabulary, hasn’t it ?

　 ---Yes． __________ more words and expressions and you will find it easier to read and communicate．

　 A． To know　 　 B． Knowing　　　 　 C． Know　　　　 　 D． Known

28．My sister Lucy is __________ different from me in looks, although we are twins．

　 A． exactly　　 　　 B． entirely　　　 　　　 C． simply　　　 　　　 D． hardly

27．--- Why are you so happy ?

　 --- It’s __________ my grandma is going to come to see me．

　 A． because　　 　 B． since　　　　 　　 C． as　　　　　 　　 D． for

26． Earth Day is a reminder that we need to _________ the world we live in and that we should learn to respect life and nature．

　 A． care for　　 　　 B． think about　 　　　 C． care about　 　　　　 D． think for

25． The boy wanted to ride his bicycle in the street, but his mother told him __________．

　 A． not to do　　 　 B． not to　　 　　　　　　 C． not do it　　 　　　　 D． do not to

24． He left the place, _________ never __________ back again．

　 A． determined; to come　　　 　　　　　　　　 B． being determined; to come

　 C． determined; coming　　　　 　　　　　　　 D． determining; to come

23． Many countries are making great efforts to help the economy __________ after a difficult period．

　 A． add　　　 　　 B． return　　　 　　　 C． recover　　　 　　　 D． calm

22． I know of him, but I have no idea __________．

　 A． where does he live　　　　 　　　　　　　　 B． he lives where

　 C． where lives he　　　　　　 　　　　　　　　 D． where he lives