1 . ______ label to each of the trees, with detailed introduction of their features, and visitors will know more about them and how to protect them.

A．To attach

B．Attach

C．Attached

D．Having attached

2 . 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

3 . — English has a large vocabulary, hasn’t it?     
—Yes. ____ more words and expressions, and you will find it easier to read and communicate.

A．Known

B．Knowing

C．To know

D．Know

4 . Look out！Don’t get too close to the house          roof is under repair.

A．whose	B．which
C．of which	D．that

5 . My parents live in a small village. They always keep candles in the house _____ there is a power out.

A．if	B．unless
C．in case	D．so that

6 . News came from the school office ________Wang Lin had been admitted to Beijing University.

A．which	B．what
C．that	D．where

7 . It is the ability to do the job ______ matters not where you come from or what you are.

A．one

B．that

C．what

D．it

8 . The number of foreign students attending Chinese universities ________rising steadily since 2010.

A．is	B．are
C．has been	D．have been

9 . It was not until she got home____Jennifer realized she had lost her keys.

A．when	B．that
C．where	D．before

10 . It was some time       we realized the truth．

A．when

B．until

C．since

D．before