几道英语选择题·很基础的·麻烦解决一下啦~

几道英语选择题·很基础的·麻烦解决一下啦~
1.Writing headlines(新闻报道要点）in English is not _____.
A.easy jobs B.an easy work C.an easy job D.the easy work
(麻烦再解释一下·这里用job和用work有什么区别）
2.I want to buy some _____ clothes
A.man's B.new C.men D.men's
(我觉得B.
3.Grandma was ill yesterday,and she had______sleep.
A.a night bad B.a night's bad C.a bad night D.a bad night's
(这个吗·也不太懂）
4.-What does Victor usually do after school?
-He just plays computer games _____ ,doing nothing else.
A.once upon a time B.more or less
C.hour after hour D.from now on