Mike was usually so careful，________this time he made a small mistake.(2012·浙江，18)
| A．yet | B．still |
| C．even | D．thus |
Many countries are now setting up national parks __________ animals and plants can be protected.
| A．when | B．which |
| C．whose | D．where |
A bank is the place __________ they lend you an umbrella in fair weather and ask for it back when it begins to rain.
| A．when | B．that |
| C．where | D．there |
Whatever is left over may be put into the refrigerator，__________ it will keep for two or three weeks.
| A．when | B．which |
| C．where | D．while |
Mary was much kinder to Jack than she was to the others，__________，of course, made all the others upset.
| A．who | B．which |
| C．what | D．that |
The children，__________ had played the whole day long, were worn out.
| A．all of what | B．all of which |
| C．all of them | D．all of whom |