I. a. Scientists
b.appearance
c.arrival
d.helpful
e.envious
II. 1.It’s too heavy for me to carry.
2.should join our study group
3.haven’t seen my cousin in ages.
4.me if I was visiting my relatives every week.
5.that he had met John at the market the previous day.
III.1.I would go to school tomorrow.
2.didn’t they ?
3.I were you.
4.to wash the dishes.
5.like some coffee?
