The new dictionaries are very useful. They        well and       already.
#101378
A
sell; have been sold out
B
sold; had sold out
C
sell; sell out
D
are sold; have been sold out
推荐题目
No sound and no voice______ for a while. 
#104900
A
have heard
B
has heard
C
has been heard
D
have been heard
. Tom as well as his classmates __________ a song when the teacher came into the classroom.
#103734
A
are singing
B
were singing
C
is singing
D
was singing
Peter ________ at this job since he graduated from college.
#99363
A
is employed
B
was employed
C
has been employed
D
had been employed