1 . Make sure you save all your work on screen____the computer breaks down.

A．in case

B．as if

C．so that

D．even though

2 . _____ small, the company has about 1000 buyers in over 30 countries.

A．As

B．If

C．Although

D．Once

3 . She understood what I was talking about________ it was the first time we had spoken together.

A．whether	B．even though
C．as though	D．since

4 . ______the damage is done, it will take many years for the farmland to recover.

A．Until

B．Unless

C．Once

D．Although

5 . We need to get to the root of the problem ________ we can solve it.

A．while	B．after
C．before	D．as

6 . It is so cold that you can’t go outside ________ fully covered in thick clothes.

A．if	B．unless
C．once	D．when

7 . Lessons can be learned to face the future, ________ history cannot be changed.

A．though

B．as

C．since

D．unless