Scientists agree that the world's climate ____ warmer over the past 50 years, but they disagree about the causes.
A.is becoming
B.becomes
C.became
D.has become

To end or greatly reduce pollution ____, people would have to stop using many things that benefit them.
A.constantly
B.suddenly
C.immediately
D.directly

_________ I ask Martha for a date and she laughs at me?
A.What should
B.What if
C.What would
D.As if

A.shout
B.plough
C.about
D.thought

A.hour
B.host
C.honest
D.honor

A.different
B.important
C.attractive
D.profession

Computers are ________used in schools and universities.
A.widely
B.wide
C.widen
D.width

Peter said he ________a test the following day.

A.had had
B.will have
C.has had
D.would have

________there have been many changes in his life, he still remains a nice man to everyone.
A.Although
B.However
C.Despite
D.Because

How well people remember things ____ on many different factors.
A.depends
B.depended
C.depending
D.depend