—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
Learning to write is learning to think. You don’t know things clearly _______ you can write them down.
#56362
A
unless
B
if
C
since
D
whether
---I don’t know where to find something about the rainforest.---Why ______on the Internet? There is a lot of information about it.
#55228
A
don’t go
B
not to go
C
not going
D
not go
—Happy Teachers’ Day! Here are some flowers for you. — beautiful flowers they are! Thank you!
#55511
A
How
B
How a
C
What
D
What a