Thank you for ________（help）me with my Chinese.

________（leaf）turn yellow in autumn.

I saw a wallet ________（lie）on the ground.

She asked me if I knew ________（who）watch it was.

When the evening came, they found all the workers ________（leave).

He failed in the game, because he ________（not work）hard enough.

By the end of last year the workers ________（build）the new building.

The young doctor ________（save）twenty people's lives by the end of last year.

I will tell him the news as soon as he ________（come）back.

He ________（join）the party in 2003.