___ is left over may be put into the refrigerator, ____ it will keep for two or three weeks.
| A．Whoever; when | B．Whenever; which |
| C．Whatever; where | D．Whichever; while |
If the children are badly ____ they behave badly.
| A．brought in | B．brought up | C．brought about | D．brought back |
Actually, Miss Zhang is not at all serious as she _____.
| A．shows | B．performs | C．appears | D．behaves |
We need to wear sunglasses to ____ our eyes from the sun.
| A．stop | B．prevent | C．save | D．protect |
The boy's bad behavior ____ his mother lots of sleepless nights.
| A．cost | B．took | C．spent | D．paid |
. He ____ to help me with my math, but I refused his help, for I decided to do it on my own.
| A．prepared | B．ready | C．insisted | D．offered |