4.You are ssupposed to hand in your homework before 10a.m.tomorrow.
分析 你应该在明天上午十点以前交上你的作业.
解答 答案:supposed.
根据"hand in your homework before 10a.m.tomorrow."明天上午十点以前交上你的作业.又根据空格前后是be和to,结合给出的首字母提示s,因此可知这个句子考查的是be supposed to do sth意思是"应该做某事"综上所述,故填supposed.
点评 首先要掌握句子的意思,如何结合具体的题目以及给出的首字母提示,就可以确定正确答案.