A,

1 I"m not sure about what we should do

B, 

1. You'd better in the dinner table on time

2. You don't have to tip in VietNam

3. Because children are given many sweets and toys , they like the Mid-fall Festival

4. If you don't have the ticket , you can not get the show

 1.I"m not sure about what we should to do => do 
B.Make up sentences using the words and phrases given
    1.You/ better/ be/ the dinner table/ time
        ->you had better be at the dinner table in time
    2. You/ not/ have to/ tip/ Vietnam
        -> you don't have to tip in VN
    3. Because children/ give/ many sweets and toys, / they like/ Mid-fall festival
       ->because children are given many sweets and toys, they like mid-fall festival
    4. If you not/ have the ticket/ you/ can/ not/ get/ the show

if you don't have the ticket, you can't get into the show