If you want to learn more about this concept, you may _____ Professor Li’s paper.
A.look up to
B.add to
C.look forward to
D.refer to
The book is _____: Several ideas have been proved not suitable for the situation today.
A.out of order
B.out of shape
C.out of date
D.out of control
My teacher lives in an apartment and it is within walking ______ of the school.
A.distance
B.event
C.district
D.track
How excited I am now! You know, it is the second time that I _____ the first prize in the 400-meter race.
A.wins
B.won
C.have won
D.is winning
When asked by the teacher in class, he freely _____ the mistakes in his composition and promised to correct them at once.
A.approached
B.admitted
C.appreciated
D.afforded
Through efforts, they harvested ______ corn than they had planned.
A.twice as much
B.twice more
C.more twice
D.as twice much
