When () your mother () you that blue dress, Mary?
A. does, buy
B. has, bought
C. had, bought
D. did, buy
----Hi,Jim! Nice to meet you!----Hi, it is one year since I last () you.
A. saw
B. see
C. seeing
D. have seen
Smoking can increase the of developing heart disease.吸烟会增加得心脏病的危险。
Her strange behaviour has our suspicions.她的古怪行为引起了我们的怀疑。