3. choose the correct optino (A,B,C or D) to complete the following passage
tony and his friends (16)......... have a trip to Vietnam next summer. At first, they are going to Hanoi (17)......... plane and they are giong to stay there in two days. Then they are giong to travel to Ha Long and Hue. They are going to visit a (18)................... of places of interest and some primary school in Hanoi. They are going to (19)........... students in the schools practice speacking English Finally. They are going to fly back to England (20)............ Hanoi
16. A. is going    B. are to      C. are going to         D. had to 
17. A. to              B. by           C. with                      D. for 
18.A. many         B. some      C. few                       D. lot
19A. help            B. visit        C. ask                        D. go
20A. to                B.from        C. for                         D. on