1 . —You see，I’m poor in maths，you are not good at English，and...
—That’s________we should help each other.

A．when

B．where

C．how

D．what

2 . My deskmate didn’t attend the class meeting last Tuesday, _______ he doesn’t know our plan for the coming football match.

A．that’s why	B．which is why
C．that’s because	D．which is because

3 . America was______was first called India by Columbus.

A．that	B．where
C．what	D．the place

4 . —— I dropped in on you at about four, p.m., but you didn’t answer the door.
—— Oh, that was probably _________ I was playing badminton in the stadium nearby.

A．that

B．what

C．when

D．why

5 . He is going to build a team that has a lot of potential and he thinks that is excites him.

A．that

B．which

C．what

D．as

6 . I wonder if ______ I haven’t been able to be outdoors for so long that I’ve grown so___________.
我不知道这是不是因为我长久无法出门的缘故，我变得对一切与大自然有关的事物都无比狂热。

7 . A selfie stick is_____ enables users to position their smartphones to get better photo angles

A．that

B．how

C．what

D．who

8 . Now the question that you must carefully consider is ____ can be put into practice.

A．how you have learned

B．how what you have learned

C．that why you have learned

D．how that you have learned

9 . The world is a book，and those who don’t travel read only one page．That’s____I’ll go on a tour this summer．

A．how

B．why

C．when

D．Where

10 . Is this research center _________ you met some foreign guests last week?

A．that

B．where

C．which

D．in which