Unit 5 How old are you?习题一、 英汉互译。1、how old_______________ 2、three lovely birds________________2、seven lunch boxes_______________ 4、here you are____________5、10+9___________________ 6、8-5____________7、make a wish___________ 8、6+4____________9、我的钢笔___________ 10、在桌子上___________ 二、...