．A distant star is observed to have weight 200 times__________ of the sun .
| A．one | B．that | C．what | D．the one |
37. I would rather you ______ in my school, Mom.
| A．not work | B．not worked | C．didn’t work | D．not working |
36. How can you know whether you will succeed ______ you never try?
| A．in case | B．when | C．unless | D．even if |
35. It was the fifth time that he ______ to such a meeting.
| A．have been invited | B．was invited | C．had invited | D．had been invited |
34. The villagers, ______ damaged by the flood, were given help by the International Red Cross.
| A．all whose houses | B．all their houses | C．all of whose houses | D．their all houses |
33. It is necessary that whoever ______ recently visited the country ______ this kind of test.
A．h as; pass |
B．has; passed | C．have; pass | D．has; passes |