从下面每小题的A、B、C、D四个选项中选出可以替换划线部分的最佳选项。
Shenzhen lies in the south of China.

A．keeps

B．finds

C．is

D．belongs

The little girl is fortunate to get help from so many strangers.

A．Lucky

B．Excited

C．Happy

D．Grateful

Liu Xiang's success came at a price.

A．Without difficulty	B．with a lot of hard work
C．With little money	D．without much time

When Jason was painting the wall, some boys passed by and wanted to join him.

A．Went out

B．Went though

C．Went away

D．Went past

The plane will take off in half an hour.

A．Leave for	B．Leave the ground and begin to fly
C．Remove	D．Land on the ground