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

A．by

B．in

C．on

D．with

2 . I committed myself__________ studying hard this year.

A．by

B．in

C．to

D．from

3 . Personally, I have__________ technological advances.

A．got stuck

B．summed up

C．died from

D．benefited from

4 . In addition, your smart home__________ your health for you every day in the future.

A．will be monitoring

B．monitored

C．be monitoring

D．to monitor

5 . By chance, she found one sentence__________ a different way to treat the wormwood.

A．suggesting

B．suggested

C．to suggest

D．has suggested

6 . 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

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

A．looked down upon

B．referred to

C．focused on

D．led to

8 . ________about their table manners, the guests decided to do everything that president did.

A．Worried

B．Worrying

C．Be worried

D．To worry

9 . ________ 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

10 . Miss Li often tells us ________ an honest person.

A．to be

B．being

C．be

D．been