She's always been kind to me — I can't just turn ______ on her now that she needs my help.

单项选择题I must leave now（） if you want that book I'll bring it next time.

A．Accidentally
B．Incidentally
C．Eventually
D．Naturally

单项选择题Mary sat at the table, looked at the glare and （） her lips.

A．smacked
B．opened
C．parted
D．separated