While Jim ______the floor, someone ______at the door.
#40407
A
was sweeping, was knocking
B
was sweeping, knocked
C
swept ,was knocking
D
swept, knocked
推荐题目
---What do you think of my answer to the question?----Sorry, What’s that? I _______ about something else.
#39461
A
am thinking
B
was thinking
C
had thought
D
thought
Each year quite a lot of food ______ around the world. It’s really time for us to do something.
#36622
A
was wasted
B
is wasted
C
wasted
D
will be wasted
— What will you do tomorrow?— We’ll have a picnic if it ______ fine.
#39962
A
is
B
was
C
will be
D
has been
The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.
#38260
A
is explained
B
will be explained
C
explains
D
has explained