Question

英语语法1、Waking,running and horse-riding are all helpful forms

Answer 1

1.exercise 指锻炼,a sport一项运动2.have sth.to be done 指主语让别人去做,说话人是秘书,秘书问老板的话,you 指的是老板,当然是老板让别人做了have sth.to do 指的是主语自己有事要做3.答案错误,应该是C practise ...