------Mom, is Dad coming to pick us up?
------Yes, I am sure he _________ on the platform when we pull into the station.
A.stands B.stood
C.has stood D.will be standing
___________ is known to everyone, the moon travels round the earth once every month.
A.It B.As
C.That D.What
Exercise is the key ______ your health．
A.to improve B.to improving C.in improving D.of improving
One can always manage to do more things no matter ________ full one's schedule is in life．
A.how B.what C.when D.where
. As a result of destroying the forests, a large ___ _ of desert
___ covered the land.
A.number; has B.quantity; has C.number; have D.quantity; have
____________ I came, the city wasn't so beautiful．
A.The first time B.At the first time
C.The first when D.For the first time
