The house could fall down soon if no one       some quick repair work.
#102475
A
has done
B
is doing
C
does
D
had done
推荐题目
The pen I _______ I _______is on my desk, right under my nose.
#104524
A
think; lost
B
thought; had lost
C
think; had lost
D
thought; have lost
—Where is Tom ?—Well , he __________ you __________ here. Otherwise he would come down right now.
#104290
A
didn’t know ; were
B
hasn’t known ; are
C
doesn’t know ; are
D
hadn’t known ; were