What can be inferred about the early Greek philosophers？
A．They were exploring the physical sciences.
B．They recorded many of the Greek myths.
C．They were primarily interested in religion.
D．They had contact with other European scholars.

The passage implies that if the air leakage came from the valve, ______.
A．there is no need to remove the inner tube
B．you could solve the problem by putting spit on it
C．you would still need to examine the inner tube
D．there would be no way to solve the problem

A．By taking a course.
B．Very well.
C．In the morning.
D．In the library.

Which of the following is NOT an example of special effects in this passage？
A．Making the fish stop swimming.
B．Causing the fish to swim away.
C．The flying of a military plane.
D．The sailing of an 165-foot-long boat.

The passage is mainly about ______.
A．a cheap way to get energy
B．the location of recycling plants
C．new ways of recycling waste
D．the word rubbish could lose its meaning

A U.S. military airplane followed the boat because ______.
A．the boat was on a dangerous voyage
B．the boat was from an enemy country
C．the boat looked like a ship from an unknown country
D．it was the effect that the director wanted