Вещества с общей формулой СпН2пО2 относятся к классу 1) спиртов 2) альдегидов 3) карбоновых кислот 4) алкенов

Прошу!Помогите!Срочно!
Circle the correct answer
1/ I.......an email to my friend yesterday.
A-send  B-sent C-am sending
2/Tim .......my sister last week.
A-am seeing B-see C-saw
3/When did you ......a DVD?
A-rent B-rents C-rented
4/..............Paris last summer?
A-Do they visit  B-Did they visit  C-Did they visited
5/ My parents .......to the theatre last night
A-go  B-are going  C-went
6/Billy ..........at the zooyesterday morning
A-was  B-is  C-were
7/Martha ............watch TV yesterday
A-don"t  B-didn"t  C-doesn"t