1 . —What do you think of Jeremy Shu-How Lin’s overnight success?
—I think it is not good luck but hard work _____ has made him what he is today.

A．that	B．which
C．when	D．where

2 . They felt ________ it was high tax and low income ________ contributed to the extreme misery of the working people at the bottom of the ladder.

A．/；that	B．that; which
C．that; what	D．/; which

3 . ---Why is it _________ Mr. Smith seldom mentions his childhood?
---Perhaps he suffered a lot in his childhood.

A．不填	B．what
C．how	D．that

4 . It was at the very beginning _________Mr. Smith made a decision ______we should send for a doctor.

A．when; which	B．that; which
C．when; that	D．that; that

5 . When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.

A．why it is	B．what it does
C．why it does	D．what it is

6 . It is _______ he often fails in exams ______ makes his parents worried about him.

A．what； that	B．that； what
C．that； that	D．/ ； that

7 . It is global warming, rather than other factors, ________ the extreme weather.

A．that have led to	B．which has caused
C．which are causing	D．that has led to