A.错误
B.正确
A.to be firm
B.being firm
C.what to be firm
D.how to be firm
To carry out a company's rules and regulations, administrative personnel must know
A.to be firm
B.being firm
C.what to be firm
D.how to be firm
A.正确
B.错误
We want to get into touch with a good shipping firm in London, such as ______.
A.you
B.yours
C.your
D.yourself
A.正确
B.错误
B.be presented
C.being presented
D.be representing
A.which
B.with that
C.whom
D.with whom