The advantage human beings have to the sun is worth discussing.
| A．take of | B．play with | C．have on | D．do with |
Parents should take seriously their children's requests for sunglasses ____eye protection is necessary in sunny weather.
A because B. though C. unless D. if
Roses need special care ____they can live through winter.
A because B. so that C. even if D. as
— Mrs Green is angry with Mary. It seems ______ she is going to call her mother.
— Right, let’s persuade Mary to give up now.
A as if B as long as C even if D in order that
He shut the window with such force _____ the glass broke.
A which B that C as D if
John plays the piano _____, if not better than, David. But he never shows off in public.
| A．as well | B．as well as | C．so well | D．so well as |