1 Can your grandpa climb a tree ? Yes, he can. (Если дедушка пожилой, то No, he can't.)
2 Can your daddy dance? Yes, he can.
3 Can you sing? Yes, I can.
4 Can your friends jump? Yes, they can.
5 Can your mummy read English books? No, she can't. (Если мама все же знает английский, то ответ Yes, she can.)
6 Can a bird fly? Yes, it can.
7 Can a horse climb? No, it can't (если climb a tree = на дерево, то нет, но если на холм (climb up the hill), то можно сказать Yes, it can)
8 Can chimps climb? Yes, they can.