( )37. It’s bad for our eyes to read books _______ the sun.
A. to B. under C. in D. over
( )38. —Watching TV too much _______ bad for your eyes.
—I’ll go to bed right away.
A. is B. are C. was D. be
( )39. _______ necessary for us _______ English well.
A. This is; to learn B. It’s; to learn C. It’s; learn D. That’s; learn
( )40. —Humans can’t live _______ air.
—I agree with you.
A. without B. with C. in D. for
