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
It was the first time that I ___________ the night face to face. 
#101477
A
had seen
B
have seen
C
see
D
seeing
Computer cannot remember who _______; it simply does what _______.
#104640
A
has used it; it is told
B
will used it; it was told
C
uses it; it has told
D
has used it; it told