Tom was about to close the window __________ his attention was caught by a bird.
| A．when |
| B．if |
| C．and |
| D．till |
Many of the creatures in Rowling’s world are not real,and much of_______happens is strange.
| A．which | B．that | C．what | D．it |
Liu Xiang’s breaking the world record was an exciting moment, _______all of us will never forget.
| A．that | B．one | C．it | D．what |
In his speech,he drew attention to the poor desert nation, _______about 36. million people are hungry.
| A．which | B．there | C．where | D．for which |
______your opinions are worth considering,the president finds it unwise to place too much importance on them.
| A．As | B．Since | C．When | D．While |
_______ in the school rules that boy students should not wear long hair.
| A．What is required | B．What requires |
| C．It is required | D．It requires |