—Haven’t seen you for ages! Where have you been?
—I went to Ning Xia and _______ there for a year, teaching as a volunteer.
| A．stayed | B．stay |
| C．had stayed | D．am staying |
Mary wrote an article on _______ the team had failed to win the game. （2005年全国I高考题）
| A．why | B．what | C．who | D．that |
Doris' success lies in the fact _______ she is co-operative and eager to learn from others.（2006年上海春季高考题）
| A．which | B．that | C．when | D．why |
These shoes look very good. I wonder _______. （2006年上海春季高考题）
| A．how much cost they are | B．how much do they cost |
| C．how much they cost | D．how much are they cost |
—Could you do me a favor?
—It depends on _______ it is. （2006年北京高考题）
| A．which | B．whichever | C．what | D．whatever |
See the flags on top of the building? That was _______ we did this morning.（2006年全国I高考题）
| A．when | B．which | C．where | D．What |