Give the correct form of the following verbs

Question 1: Give the correct form of the following verbs 
   1. While I ... the performance, I met one of my old friend.                             (watch)
   2. Nam ... football yesterday.                                                                         (play)
   3. You should ... the bule sweater. It suits you better than the red one.         (buy)
   4. My father ... up at 5 o'clock every morning.                                                (get)
   5. She ... English at the moment.                                                                    (learn)
   6. He ... to Hung King Festival since last Sunday.                                           (go)
   7. Before leaving the dinner table, ... You ... ask for permission?                    (have to)
   8. When I ...., the whole family was having dinner around a big dining table.  (come) 
Question 2: There is a mistake in the four underlined parts of each sentence
   1. 
In Australia, you mustn't to comment on a person's accent.
A                              B              C                                 D
   2. 
In my family, children has to get permission before leaving the dining table.
A                                    B                 C                           D                     
   3.
When I come, the whole family was having dinner around a big dining table.
   A           B                                     C                                                   D
   4. 
Lang Lieu couldn't bought any special food because he was very poor
                             A            B                             C                             D