---when _______the telephone________，do you know?---Yes．In 1876．
#39777
A
was，invented
B
are；invented
C
did；invent
D
had，invented
推荐题目
The English teacher isn't here. She ________ to the office.
#39233
A
has been
B
has gone
C
went
D
did go
-Have you visited New York?-Yes, I have. I __________ there twice.
#36758
A
have gone
B
will go
C
have been
D
went