Most of the older civilizations which flourished during the fifth century B.C.are died out.
A．they have died out
B．has died out
C．have died out
D．they had died out

During the examination you are supposed to stay in your seats, to keep your eyes on your papers, __ to anyone.
A．but could not talk
B．not talk
C．and not to speak
D．rather than

A．Because she is ill.
B．Because she is cold.
C．Because she likes buying heavy coats in summer.
D．Because heavy coats are cheap in summer.

The writer gives the example of national defense in paragraph 2 in order to show that______.
A．there will be no safety if there is no national defense
B．all the people should be responsible for national defense
C．a public good is a shared benefit for the whole society
D．some public goods are more important than others

The pictures of the Loch Ness Monster show a remarkable resemblance to a plesiosaur, a large water reptile of the Mesozoic era presuming extinct for more than 70 million years.
A．supposed
B．presumably
C．presumptuous
D．is presumed

We are looking forward __ you soon.
A．to see
B．to seeing
C．see
D．to be going to see