Without petroleum human life ____quite different today.
A、is
B、will be
C、would have been
D、would be
第1题:
15.
A.is
B. does
C. has
D. have
第2题:
A.is
B.are
C.been
D.be
第3题:
Most students in this class ( ) from the countryside.
A.is
B.are
C.will
D.would
第4题:
A、are…being
B、is…being
C、has…been
D、have…been
第5题:
A. is
B. are
C. has
D. have
第6题:
Advance freight together with other charges ______ due on shipment.
A.is
B.are
C.has
D.have