Give the correct tense or form of verbs in brackets

1.  They wish they                    the appointment. (not forget)

2.  Last night, I was doing my homework while my sister___ games. (play)

3.  If it                        , we will stay at home. (rain)

4.  It's difficult                      used to getting up early. (get)

5.  A tree                        in the garden by the students yesterday. (plant)

6.  Nga asked Nhi if she _                Lai Chau city. (know)

7.  Ba would travel around the world if  he _        rich. (be)

8.  Mr. Jone_______        principal of our school since last year. (be)