Although the teacher had told Bob the history of telephone, Bob didn’t know when ____. 
#37382
A
it was invent
B
was it invented
C
it was invented
D
it invented
推荐题目
-She asked me __________ go to the park.
#38466
A
how she can
B
how she could
C
how can she
D
how could she
I asked my lawyer      say in court . 
#79237
A
what I should
B
what should I
C
how I should
D
how should I
 — Can you tell me ______?— Just try to use it, I think.
#36409
A
how can I learn English well
B
how I can learn English well
C
how could I learn English well
D
how I could learn English well
We want to know _____to help them.
#39102
A
what can we do
B
whatwecan do
C
how can we do
D
how we can do