Rick has learned a lot about Chinese culture _____ he came to China.
#55330
A
before
B
when
C
until
D
since
推荐题目
–Mr Green, can we do to protect ourselves when facing dangerous attackers in public places?–Always remember “run, hide and fight” when you are in danger.
#55449
A
what
B
how
C
where
D
which
________ we deal with our problems, we can easily become unhappy.
#55210
A
Until
B
If
C
Unless
D
Though