.Whenever you enter the reading room, you can find all the students _____ at their desks, with their attention _____ on the books, except Tom. 
#97675
A
sitting, fixing
B
to sit, fixed
C
seating, fixing
D
seated, fixed
推荐题目
The time he has devoted in the past years ________ the disabled is now considered _______of   great value.
#92923
A
to help; being
B
to help; to be
C
to helping; to be
D
helping; /
. When we visited my old family home, memory came ________ back..
#98548
A
flooding
B
to flood
C
flood
D
flooded
 After describing the planned improvements, she went on _____ how much they would cost. 
#98758
A
to explain
B
explaining
C
to be explaining
D
having explained