18.The actual cost of printing the book was much higher than his (earlier) estimate.选择能代替括号里的选项

18.The actual cost of printing the book was much higher than his (earlier) estimate.选择能代替括号里的选项
A.essential
B.potential
C.substantial
D.initial
满分：4 分
19.He is eager to win because his enjoyment of a game lies in the struggle to defeat his____.
A.enemies
B.opposites
C.opponent
D.friends
满分：4 分
20.The task has been (laid down) on me by very unfortunate circumstances,but I must perform it as well as I can.选择能代替括号里的选项
A.given
B.imposed
C.offered
D.assigned
满分：4 分
21.For a long time scientists have suspected that life exists on other ____ besides the earth.
A.planes
B.plains
C.planets
D.plants
满分：4 分
22.The （foundation） was not firm enough to support the weight of the apartment house.选择能代替括号里的选项
A.root
B.basis
C.basic part
D.substructure
满分：4 分
23.If Henry had not pull his cap low over his brow,he ___ by the police.
A.might be recognized
B.might have been recognized
C.would have recognized
D.was to have been recognized
满分：4 分
24.Parents sometimes （do harm） to their children,not by teaching them too little but by trying to teach them too much选择能代替括号里的选项
A.influence
B.afford
C.injure
D.affect
满分：4 分
25.Great changes _____ in Beijing in the past three years.
A.took place
B.have taken place
C.has taken place
D.have been taken place