---myself,i began to eat.A Be seated B.Seated C.Seat D.Seating选什么,为什么
2、you must be firm--- you think yourself to be right.
A.on which B.where C.what D.no matter how
选哪个,为什么选这个.a和b的区别.
3.where is your father?he --- Beijing for a week.
A.has gone off to B.has left for C.has been off to D.has set off for