—The sky looks terrible!
—It will be worse __________we take action to protect the environment.
A.unless B.if C.when D.after
—How many people will come to the party this evening?
—About 15 people _____________.
A.were invited B.invited C.will invite D.invite
—____________interesting science class we had today!
—Yes! Now I know more about how the earth and the sun moves!
A.How B.What C.What a D.What an
—How long has Mr. Brown _________________?
—Since two years ago.
A.came to Jinan B.left the U. S. C.started his job D.stayed here
—It's popular to make friends on the Internet.
—Yes, but sometimes we should _________ invitations from the net friends.
A.pull down B.write down C.cut down D.turn down
—Do you want to watch game shows or sitcoms?
一 _________________ I like to watch people try their best in the games.
A.Sitcoms! B.Yes, I do. C.Game shows! D.No, I can't stand them.
