The students _______ their homework carefully when the teacher walked into the classroom quietly.
#36148
A
do
B
did
C
are doing
D
were doing
推荐题目
I am looking after Tom today.He’s been in my house ______________ 8:00 this morning.
#36256
A
since
B
for
C
at
D
till
The world _____ . Things never stay the same.
#38620
A
changes
B
is changing
C
was changing
D
will change
- What's that terrible noise? - The neighbors_______ for a party.
#38508
A
prepared
B
prepare
C
will prepare
D
are preparing
They say this kind of fruit good and well.
#41661
A
tastes; is sold
B
is tasted; sells
C
tastes; sells
D
is tasted; is sold
—Have you watered the plants yet, Kathy? —Yes. I ________ that this morning.
#37014
A
will do
B
did
C
have done
D
was doing