Народ решите задание не сложное, но у меня где то ошибка

[tex] \left \{ {{x-y = 5} \atop {x^{2}+y{2} = 81 -2xy}} ight [/tex]

Тане с Сашей 14 лет,Саше с Петей-20 лет,а Тане с Петей-16.Сколько лет Тане,Саше и Пете вместе?Сколько лет каждому из них?

Part A. Choose the right variant.

A) wrote a test         B) has written      C) did write        D) was writing

A) go    B) does go     C) goes      D) is going

A) will be watching     B) will watching      C) will be watched      D) will watch

A) doesn’t build        B) has built       C) hasn’t built        D) didn’t build

A) didn’t meet      B) weren’t meeting        C) had met       D) meet

A) the      B) -      C) a       D) an

A) a      B) the         C) an        D) –

A) an,   the      B) - , the      C) -, -     D) the, the

A) the      B) a      C) -       D) an

A) didn’t play      B) hasn’t played      C) hadn’t played      D) wasn’t played

A) saw     B) had seen     C) have seen      D) was seeing

A) has been working      B) have worked        C) will have worked     D) had worked

A) will be washed          B) will be washing        C) would wash        D) will have washed

A) will leave        B) is leaving        C) is going to leave       D) leaves

A) come, will show     B) will come, show    C) came, would show    D) will come, will show

Part B. Make one sentence using Complex Object.

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Mother made______________________________

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Make the plural.

Give degrees of comparison.

Part C. Translate into English.