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Japan lies _______ the east of China.

A．in               B．on               C．to               D．a(chǎn)t

Guangdong is _________the southeast of China.

A．in               B．on               C．to               D．a(chǎn)t

People have to work ________ weekdays.

[　　]

People have to work ________ weekdays.

[　　]

I like going to school_____bike.

A．in               B．on               C．by               D．a(chǎn)t