单项选择题

Hurry up! The train（）. You know it（）at 8:30.

A.leaves；leaves
B.is leaving；leaves
C.leaves；is leaving
D.is leaving；is leaving

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When you go by train，please see to it（）you take an express，（）that stops only at big stations.

A.that；one
B./；the one
C.that；it
D./；it

单项选择题

E-mail，as well as telephones，（）an important part in daily communication．

A.is playing
B.have played
C.are playing
D.play