Scientists believe the first inhabitants of the American arrived by crossing the land bridge that connected Siberia and ______more than 10,000 years ago.
A.this is Alaska now
B.Alaska is now
C.is now Alaska
D.what is now Alaska

Margaret Brent, because of her skill in managing estates, became ________, largest landholders in colonial Maryland.
A.what the
B.one of the
C.who the
D.the one that

_______that Columbus sailed to America.
A.That was in 1492
B.It was in 1492
C.In 1492
D.It is in 1492

She turned off the record player_______ she could study.
A.in case
B.but
C.so that
D.even if

A.continuous
B.malicious
C.scandalous
D.delicious

A.departure
B.capitalism
C.monetary
D.contrary

A.mysteriously
B.originally
C.necessary
D.elaborately

A.imagine
B.enormous
C.permission
D.possible

No sooner had gold been discovered in California than thousands of people set out for the west coast of North America.
A.It was not soon after the time that gold had been uncovered in California that thousands of people departed for North America’s west coast.
B.The west coast of North America became the destination of thousands of people the moment that gold was found in California.
C.Thousands of people had already begun their joumey to the west coast of North America by the time gold was found in California.
D.Thousands of people were heading for California on the west coast of North America vvhen the news of the discovery of gold there reached them.

I see no reason to change my clothes so long as they are not excessive dirty.
A.I will have to change my clothes if they get any less clean than they currently are.
B.If my clothes were a bit dirty, then probably I would think about changing them.
C.It is illosical to change my clothes when they are not actually dirty.
D.Provided my clothes are not very dirty, I do not think it necessary to change them.