– Can you play with us Tina?-- I have my sister. She can’t be at home alone.A. Sure; t

问题补充：

– Can you play with us, Tina?

-- , I have my sister. She can’t be at home alone.

A. Sure; to babysit

B. Sure; babysit

C. Sorry; to babysit

D. sorry; babysit

答案：

A. Sure; to babysit

B. Sure; babysit

(答案→)C. Sorry; to babysit

D. sorry; babysit

解析：sure当然了;sorry抱歉;句意:蒂娜,你能和我们一起玩吗?联系下文,她不可能独自在家.可知前文句意为;抱歉,我不得不照顾我的妹妹.短语have to不得不,必须.故选C.