—How long have you known the doctor ? —         he helped me three years ago.
#58435
A
When 
B
Before 
C
Because
D
Since
推荐题目
—What’s the matter with you? You look so worried.-- I don’t know ___________ the problem.
#57173
A
what to solve
B
how to solve
C
to solve what
D
how can I
You will be late ______ you hurry up.
#55421
A
after
B
when
C
unless
D
until
________ I’m thirsty , __________ I drink some water.
#56504
A
Because ; so
B
So ; because
C
Because ; /
D
So ; /