A:Yes, sometime
B:Yes, I did
C:Yes, never
D:No, I didn’t
长方形有____、____.
正方形有____、____.
平行四边形有____、____.
-Clark, your room is really in a mess, It needs ____
-Sorry , mum . I’ll do it at once
为了纪念五四爱国运动爆发94周年,一批海外留学生举行了别开生面的“国旗下的宣誓”活动,他们将宣誓活动地点选在了与五四运动爆发原因直接有关的( )
47-32=____ 350+40=____ 72-19=____
19+26=____ 27+14=____ 370-80=____
56+21=____ 210-80=____