Your cold’s worse, Ann．Go back to bed and I ____ the school to tell them you can’t come．
| A．have rung | B．ring | C．will ring | D．rang |
30. M
r. Keller ______ forty cigarettes a day until he gave it up.
| A．had smoked | B．smokes | C．have smoked | D．smoked |
29. --- Do you know that man?
--- Not really, just a nodding _______.
| A．acquaintance | B．participant | C．relation | D．frequent |
28. Please remember___wins you respect is not your background but your knowledge and virtues.
| A．that | B．what | C．which | D．where |
27. I find it astonishing that she _____ treat you like this in public.
| A．should | B．must | C．may | D．would |
26. Their work ______, all the experts went out for relaxation.
| A．to complete | B．completing | C．completed | D．had been completed |