①集体的力量取决于成员的多少 ②集体利益是集体中每个成员努力的结果
③事业的成功需要团结互助 ④团结的集体才有凝聚力和战斗力
A:①②③
B:①③④
C:①②④
D:②③④
We need two students____ (clean)the classroom.
They need help at the old ____ (people)home
Do you make any ____ (friend)here?
Mr.Wang teaches ____(they)math.
Sally is busy ____ (do)her homework.