— Why are you so popular with your students?— As a teacher, I seldom give my students so difficult a problem ____ they cannot work out.
#4683
A
as
B
that
C
if
D
which
推荐题目
Luckily, Smith brought a map, __________ we would have got lost.
#4527
A
that
B
of which
C
without which
D
which
______ he did was quite right.
#4548
A
What
B
Which
C
That
D
Who
I wish I ___________ the star last night.
#4814
A
saw
B
were to see
C
had seen
D
did see