1 . Yesterday I bought an ancient Chinese vase, ________was very reasonable.

A．which price

B．the price of which

C．its price

D．the price of whose

2 . The boss, ________ company my father has worked in for 20 years, is kind.

3 . I wish to thank Professor Johnson, without____________ help I would never have made such great progress. (用适当的词填空)

5 . The parents are making changes to their previous education methods. They begin to be aware of their negative effect. （同义句转换）
→The parents are making changes to their previous education methods, _______   _______negative effect they begin to be aware.

6 . Mr Smith, ________foot was badly hurt, was quickly sent to the local hospital.

7 . 本年度的诺贝尔生理学或医学奖已授予屠呦呦（得主之一），她的研究使青蒿素这种至关重要的新型抗疟疾药物得以发现。
This year’s Nobel Prize of Physiology or Medicine has been ________to Tu Yoyo (co-winner), ________research led to the discovery of artemisinin, a crucial new treatment for malaria.

8 . Ms. Ji is an experienced teacher, ________ teaching methods are always making a positive impact on us young teachers. （用适当的词填空）

9 . It is going to be some time________he sees his father again,________ business has just been set up in the UK.

A．before; his	B．until; his
C．before; whose	D．until; whose

10 . Watch out! You’re standing on a dangerous bridge, ______ stairs are being repaired.

A．which

B．where

C．that

D．whose