题目

成为毛.泽东诗句“三军过后尽开颜”创作背景的史实是              （    ） A、井冈山会师        B、红军长征         C、百团大战       D、南京解放   答案：B— Mum, would you please buy me an MP5 player?— If you can help do some housework the whole vacation，you ____ have one as a reward.A．mustB．needC．wouldD．shall