Radium salts，which have been found to ______ in bones，give rise to bone cancer.
#71991
A
pile up
B
build up
C
keep up
D
pull up
推荐题目
To reduce the pressure of traffic in our city, the government _____ banning cars in the city centre.
#75323
A
approaches
B
advocates
C
assists
D
agrees
The band ________ in about 1970, but happily they reunited in the mid-1980s.
#68689
A
broke up
B
broke in
C
broke out
D
broke down
Once he has _______, nothing can change his mind.
#66893
A
made up his mind
B
decided his mind
C
determined his mind
D
made his mind