can you help me now?yes.will you take the book to the library?well,you can do it later.
i really must go now,or i,ll be late for school.
you have an exam this morning,do not you?maybeyou should ask your father for a ride.
a.must i do it now?
b.all right.
c.what do you want me to do、
d.you must not be late
e.but do not forget to do it today