jack （）too tired.A、looks B、looks like C、likes D、looks at

A look 可以当系动词表示看起来…….
look like 表示看起来像…….
He looks like a doctor．他看上去像老师.

look 是系动词，看起来... 后面加形容词
look like 看起来像....。 因为like是介词，所以look like 加名词
这句话选a， 因为Jack是三单，所以look要加s

答案选A， jack looks too tired. Jack 看起来很累。
look 在这里是系动词，后面接形容词， 意思是 看起来xxx

选A，looks，这里是系动词

You look like your father
you just look like as tired as a dog
she is like her mother
be like 是像……look like 后面多接名词
You looks good!与这题类似

b是长得像啥东东，选A