1 I think that he is 13=I think he is 13 2 wonder 想知道 I wonder if he is listening to me 3 I like apples best=My favorite fruit are apples 4 be back to do sth 回去做某事 5 on vacation 在度假 on duty 在值班 6 be similar to 与· · · 相似 7 from to 从· · · 到· · · · · 8 eat - ate - eaten 吃 9 I will be back in two weeks 两周后
10. be fun to do sth.做某事有趣