2011年职称英语考试理工类C级模拟(9)

31 On a clear night.people can see

A 150 stars

B hundreds of stars

C one thousand stars

D more than 14,000 stars

32 Light pollution occurs when

A artificial lights illuminate the night sky

B the moon lights up the night sky

C too many stars are visible in the night sky.

D streetlights are turned off

33 Nowadays even suburbs are becoming unsuitable for scientists to do their jobs

because

A the night sky there is too dark

B the once dark areas are also polluted by fights.

C these areas are not polluted by chemicals

D these areas are less developed

34 How does light pollution affect wildlife?

A Animals may go off course

B It helps migrating birds find their homes

C Animals are afraid to go out after sunset

D It helps birds fall asleep

35 The title“Light Night，Dark Stars”means

A the night sky is brightly lit up and stars are black

B lights appear at night and stars are seen in the dark

C city lights at night illuminate stars in the sky

D city lights illuminate the night sky.making stars invisible