1 . _______ we all know, China is increasingly powerful.

A．Which

B．As

C．It

D．What

2 . Afraid of making mistakes, students in this school are always slow in answering teachers’ questions, _____ is often the case in many other schools.

A．as

B．it

C．that

D．such

3 . _____ we know, plants and animals are important to us.

A．When

B．As

C．That

D．Who

4 . The Great Pyramid is such a famous place of interest in the world, ________ was built in ancient times in Egypt, ________ every tourist likes to visit.

A．which, that

B．which, as

C．as, which

D．that, which

5 . The Rainbow Bookstore, ______ 50 years ago, was closing, ______ made me heartbroken.

A．dated back to; which	B．dating back to; which
C．dating from; when	D．dates from; when

6 . This picture was taken at my high-school graduating ceremony on June 10^th that year, _______________ I still remember well as a great milestone in my life. (用适当的词填空)

7 . Many experts attended the conference, ______________.

A．most of whom from America	B．most of them from America
C．most of them were from America	D．most of whom were from America

8 . I, ________ one of the sports-lovers, often spend some time on training in the stadium.

A．who am

B．who is

C．that am

D．whom is

9 . In their country, August 31st is a national holiday, ________ everybody dances in the streets.

A．which

B．as

C．when

D．Because

10 . More than one student, ______ took part in the activity, ______ that the charity activity means a lot.

A．who, thinks

B．who, thought

C．that, thinks

D．whom, think