Giúp mik với khó quá ;-;

Điền từ in đậm vào chỗ trống

    dolphin         insect              penguin                     reptile                  snake

My father’s a zoologist. That’s a person who studies animals. He knows a lot about (6) __________s, like crocodiles and (7) __________s. He loves to study strange birds too – talking ones like parrots and swimming ones like (8) __________s. He doesn’t like (9) __________s , though. He’s actually afraid of them – especially bees. Does that mean he’s afraid of spiders too? Well, no. Spiders are arthropods – they’re different to bees and ants and things. He says his favourite animal is the (10) __________ because it’s very clever and he loves the way it swims.

Cho hình chữ nhật ABCD, kẻ AH vuông góc với BD. Gọi M, N, I lần lượt là trung điểm của BH, CD và AH.
a) Chứng minh rằng DI song song MN
b) Tính số đo góc AMN.