Both of my brothers are now married,so I have two_____.
a.sister-ins-law
b.sisters-in-law
c.sisters-in-law
d.sister-in-law
_____you understand this rule,you„ll have no difficulty in dealing with such problems.
a.While
b.Though
c.Unless
d.Once
The driver pulled_____at the traffic lights.
a.in
b.off
c.up
d.out
Your bike needs_____.You„d better do i right now.
a.clean
b.to be clean
c.being cleaned
d.to clean