— They speak perfect English. How long have they learnt it?— ______ they were seven years old.
#56728
A
Since
B
When
C
After
D
Until
推荐题目
English is easy        my son.
#56894
A
and
B
but
C
for
D
in
Don’t get off the bus ________it has stopped.
#55561
A
until
B
if
C
because
D
though
I didn't go there____the bad weather. 
#57238
A
because
B
if
C
but
D
because of