On a rainy day I was riding my bike to pick up my son ___ a terrible accident happened ahead.
#31616
A
who
B
which
C
while
D
when
推荐题目
Convenient ___private cars are for us, they may also cause traffic accidents and pollution.
#33185
A
while
B
as
C
if
D
since
This building is both a secret and a mystery. No one shall be admitted into it ______ he can give the right password.
#32225
A
if
B
as
C
since
D
unless
The buses, most of _______ were already full, were surrounded by an angry crowd.
#34636
A
that
B
it
C
them
D
which
She is very dear to us. We have been prepared to do ______ it takes to save her life.
#80597
A
whichever
B
however
C
whatever
D
whoever