________ the difficult maths problem, I have consulted Professor Russell several times.
#88373
A
Working out
B
Worked out
C
To work out
D
Work out
推荐题目
____ by high mountains, the city is infamous for air pollution.
#90478
A
Surrounding
B
To be surrounded
C
Surrounded
D
Having surrounded
After completing and signing it, please return the form to us in the envelope _______.
#91566
A
provided
B
providing
C
having provided
D
provide
When I got back home I saw a message pinned to the door, ______ “Sorry to miss you; will call later.”
#92895
A
read
B
reads
C
to read
D
reading
He sat on the sofa, with his arms ________ and eyes _______ on TV.
#95545
A
crossed; looked
B
crossed; looking
C
crossing; looked
D
crossing; looking
－What will today’s talk be about?－In the lecture ______, the professor will tell us something about modern English usage.
#90074
A
following
B
followed
C
to follow
D
to be followed