A.in | B.on | C.at |
A.fly | B.flys | C.flying |
A.星期日 | B.星期六 |
A.每个人 | B.所有人 |
A.照片 | B.图画 |
A.三明治 | B.蛋糕 |
A.开始 | B.结束 |
A.dog | B.duck | C.fly |
A.Saturday | B.Sunday | C.naughty |
A.sing | B.shining | C.looking |
A.tree | B.sun | C.moon |
A.hungry | B.eat | C.fly |
A.swim | B.rain | C.snow |
A.of | B.on | C.in |
A.an sandwich | B.sandwiches | C.sandwichs |
A.eating | B.eats | C.eat |