填空题Only if people of all the countries are united______(我们才能解决) the existing problems in the world. (solve)
问答题请设计一节课的教案，达到以下目的： 1．学生通过对例文的学习能够写作thank-you：letter； 2．培养学生运用英语的能力。
填空题My mother was so proud of all______(我所做的) that she rewarded me with a trip to Bei- jing. (do)
