1 . The Tang Dynasty is generally considered to be a golden chapter by people worldwide, ______ the Chinese civilization influenced many neighboring countries.

A．where	B．who
C．which	D．when

2 . We will put off the picnic in the park until next week, ________ the weather may be better.

A．that	B．where
C．which	D．when

3 . In times of trouble, _______ our spirits are low, telling our worries and fears to friends eases the stress.

A．when

B．where

C．which

D．that

4 . Between the two parts of the concert is an interval, ________ the audience can buy ice­cream.

A．when	B．where
C．that	D．which

5 . I didn't become a serious climber until the fifth grade, _____ I went up to rescue a kite that was stuck in the branches of a tree.

A．when	B．where
C．which	D．why

6 . “You'll have to wait for two hours, ________ is, at about 11：30, ________ the medical report will come out, ”the doctor said to me.

A．that; when

B．which; that

C．that; which

D．it; whose

7 . My uncle arrived on a Wednesday,________ I was very busy.

A．which

B．where

C．when

D．why

8 . It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．

A．when; which

B．when; that

C．that; which

D．that; that

9 . Everyone will go through life's stages of ups and downs, ________ self­respect plays a key role in the maturity(成熟) of a person.

A．when

B．which

C．as

D．that

10 . The book was written in 1946, ____ the education system has witnessed great changes.

A．when

B．during which

C．since then

D．since when