---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 film began 10 minutes ago.
#38750
A
The film has begun for 10 minutes.
B
The film didn’t end 10 minutes ago.
C
The film has been on for 10 minutes.
D
The film has on 10 minutes.
In the last two years the workers______ many tall building.
#36479
A
had built
B
was built
C
will build
D
have built
—Mom, when can I go out to play football?—Finish your homework first, or I ________let you go out.
#42108
A
don't
B
didn't
C
won't
D
haven't
—Where is your mother，Tom?—She _________________the dishes in the kitchen.
#42364
A
washes
B
washed
C
has washed
D
is washing
----Can you tell me if he ________ ?----If he _________, I will call you.
#39838
A
comes, comes
B
will come, comes
C
comes, will come
D
will come, will come