— ______________? 

— I can't find my English book.

①扩大养猪规模   ②获利减少   ③减小养猪规模   ④获利增加

如图，在等腰Rt△OAA₁中，∠OAA₁=90°，OA=1，以OA₁为直角边作等腰Rt△OA₁A₂，以OA₂为直角边作等腰Rt△OA₂A₃，…则OA₄的长度为____．

完形填空

    Tom and Tim are brothers. They are 1 Australia. They live in a mountain village. Tom is 104 years old and Tim is 102 years old now. They 2 their story in a book called Enjoy Our Life.

    Here is some of their advice(建议) for living a long, 3 life.

    ★Get up 4. They get up 5 6:30 or 7:00 in the morning.

    ★Have a 6 breakfast. The brothers eat oatmeal(燕麦粥), half a banana,  7 and eggs with a little cheese(奶酪).

    ★8 every day. The brothers like 9 mountains. They also walk on the hills(小山) every day.

    ★Eat a lot of 10, especially(尤其) garlic(大蒜). Garlic is good 11 your health.

    ★Don't eat a lot of salt(盐) and fat. These things are 12 for your body(身体).

    ★Don't listen 13 the doctors always. Most of the doctors don't know what to do with us. When there is 14 wrong with us, they don't know how to treat(治疗) us. They are always surprised(吃惊) to see us live so 15.