The substance can be added to gasoline to ______ the speed of automobiles.
#81438
A
quicken
B
shorten
C
loosen
D
enlarge
推荐题目
 He looked quite healthy though he was ____.
#82581
A
in seventy
B
in his seventies
C
at seventies
D
age of seventy
Major spending is required to ______ fundamental improvements in housing.
#83531
A
set about
B
get through
C
bring about
D
hang on