11.Copernicus maintained that the earth ______ round the sun.
A. moves
B. moved
C. moving
D. move
12.He was very ______ to go，but he had no choice.
A. ready
B. willing
C. reluctant
D. hesitant
13.Two-thirds of his property ______ lost in the fire.
A. was
B. were
C. are
D. have been
14.Remember， nothing hurts concentration ______ reading too slowly.
A. rather than
B. as well as
C. more than
D. instead of
15.Many people have made a ______ to a physical fitness program so as to maintain good health.
A. decision
B. commitment
C. contribution
D. difference
16.Scientists could see many things that most people would ______ to see.
A. feel
B. fail
C. fall
D. fill
17.She passed the examination ______ she studied very little.
A. in spite of
B. despite
C. though
D. in that
18.The father wished the twins to be doctors， but ______ of them liked to study medicine.
A. both
B. neither
C. either
D. none
19.John is so strongly built that he looks as if he ______ an elephant.
A. lifts
B. is lifting
C. lifted
D. could lift
20.The book was sold ______ 50 dollars.
A. in the price of
B. at the price of
C. with the price
D. of all the price in
