1 . Great contributions _________________ (make) by Mr. Wang to the company in the past ten years. So he deserves the praise. (所给词的适当形式填空)

2 . Thanks to the new technology, costs ________ (reduce) by 20% over the past year. (所给词的适当形式填空)

3 . So far it ________ (confirm) that the meeting will take place next week. (所给词的适当形式填空)

4 . The fine tradition, which ________ (observe) for 2000 years, shouldn’t be ignored by any of us. (所给词的适当形式填空)

5 . It _________ (prove) that a balanced diet is good for health. (所给词的适当形式填空)

6 . Large quantities of food _______(send) to the countries struck by the earthquake so far. (所给词的适当形式填空)

7 . Most houses ____________(equip) with automatic fire alarm systems since then. (用所给词的适当形式填空)

8 . Our records ____________(update) twice recently. (所给词的适当形式填空)

9 . The old gas lighting ____________(replace) by electricity. (所给词的适当形式填空)

10 . Up to now, large quantities of food ________________ (send) to India to save the dying. (所给词的适当形式填空)