21．一Excuse me, can you spare me a few minutes?
一 ?
A．What’s on B．What is it? C．What’s up D．What’s more
22．I was going to pay a visit to Smiths when Mr．Green called me up，who I
didn’t know at all．
A．the：the B．the；a C．a；the D．a；a
23．一Does Jack do his new job well?
一his old job．He made the same mistakes．
A．No better than B．Not better than
C．Not so well as D．No as well as
