The health organization is ___________ its tenth anniversary this year.
| A．congratulating | B．being congratulated | C．celebrating | D．being celebrated |
The couple are spending their holiday on _____is described as one of the most beautiful islands.
| A．that | B．what | C．which | D．where |
Up to now, they _______enough money for students who can’t afford to go to school.
| A．are raising | B．have been raising |
| C．have raised | D．had raised |
As far as I know, he is seldom, ______, absent from school.
| A．if any | B．if so | C．if ever | D．if not |
--- Would you mind if I smoked here?
---I am afraid…, but if you________.
| A．will | B．must | C．would | D．may |
How long do you suppose it is ___________ he arrived there?
| A．when | B．before | C．after | D．since |