17页：一 1 learns 2 plays
3 is singing 4 will see 5 washes
二 1 our their 2 Its 3 our 4 her 5 his her their my my
三 CABCB
20页：一 1 buy 2 pair 3 for 4 their 5 Where
二 BACBB
三 1How much 2 Whose 3 How many 4 When 5 How old
四 DB Policeman
ok?
六年级边玩边学上册海大17页的英语和20.21的啊急 回答了分提高求求你们了快啊