The researchers who study jokes want to know       people from different nations and cultures find funny.
#79084
A
why
B
that
C
what
D
whether
推荐题目
I didn’t know  ________.
#38751
A
when did the plane take off
B
when the plane took off
C
when the plane takes off
D
when does the plane take off
When changing lanes, a driver should use his turning signal to let other drivers know      .
#79081
A
he is entering which lane
B
which lane he is entering
C
is he entering which lane
D
which lane is he entering