1 . Emily finally found her dog__________ the help of the policeman.

A．by

B．in

C．on

D．with

2 . Several years after they said goodbye to each other, they met again__________ in Paris.

A．in this sense

B．by chance

C．early on

D．on the one hand

3 . Reading books is a good way ________ the world.

A．know

B．knows

C．to know

D．knowing

4 . —Who do you think was ________ student in our school talent show this year?
—Peter was, I think.

A．popular

B．more popular

C．the most popular

D．most popular

5 . She just stared at me, ________ a beautiful smile, which made me strangely _______.

A．flashed, pleased	B．flashing, pleasing
C．flashing, pleased	D．flashed, pleasing

6 . The policeman said it was his careless driving that ________ the accident.

A．looked down upon

B．referred to

C．focused on

D．led to

7 . ________ you begin to do something, you must carry on with it, otherwise you will never achieve anything.

A．Once

B．Unless

C．Before

D．Although