The books _______ belong to Mr. Smith.
| A．which is on the table | B．lying on the table |
| C．are on the table | D．which on the table |
—What did your parents think about your decision?
—They always let me do __________I think I should.
| A．when | B．that |
| C．how | D．what |
Nobody believed his reason for being absent from class__________he had to meet his uncle at the airport.
| A．why | B．that |
| C．where | D．because |
—It’s thirty years since we last met.
—But I still remember the story, believe it or not, __________ we got lost on a rainy night.
| A．which | B．that |
| C．what | D．when |
— Could you do me a favour?
— It depends on __________ it is.
| A．which | B．whichever |
| C．what | D．whatever |
We haven’t settled the question of __________it is necessary for him to study abroad.
| A．if | B．where |
| C．whether | D．that |