People should think about _____ they can have a positive influence on the planet.
#79242
A
why
B
that
C
what
D
how
推荐题目
If you are in any doubt as to _____ you should be doing these exercises, consult your doctor.
#79170
A
that
B
which
C
what
D
whether
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
I’m interested in _________the book is worth reading.
#37523
A
if
B
if or not
C
either of not
D
Whether
–Do you know ______ the Capital Museum? –Next Friday.
#39392
A
when will they visit
B
when they will visit
C
when did they visit
D
when they visited