单选题 Dogs can be used to guard a house for his host because______.

A、 they are good at running
B、 they are very kind and friendly to people
C、 they are brave enough to get the strangers(陌生人) and thieves away from the house

【正确答案】 C

【答案解析】[精解] 题干的意思是狗为什么能为主人看守房子。A的意思是它们很擅长奔跑。B的意思是它们对人亲切友好。C的意思是它们很强壮能把陌生人或小偷赶到房子外面。从常识中我们可以判断正确答案为C。