1 . ________is known to all, the earth is round.（用适当的词填空）

2 . The science of medicine, in_______ progress has been very rapid, is perhaps the most important of all the science.

3 . The doctor was very impolite to the patient, _______of course, made things even worse.

4 . The skin is an essential part of your body, _________ functions are very complex. (用适当的词填空)

6 . St Petersburg,___________ is a very beautiful city, was once called Leningrad.

A．who

B．that

C．where

D．which

7 . I bought a novel yesterday, ______ was written by a famous writer.

A．that

B．when

C．which

D．whose

8 . There they met people from other parts of the country,   ______also volunteered to help those struggling in the disaster. (用适当的词填空)

9 . 春节是中国最重要的传统节日之一，它总是让我们想到家庭团聚。(remind…of…) (汉译英)

10 . 我建议你提前了解一些唐朝的历史, 这有助于你更好地理解将要学习的诗。(in advance) (汉译英)