1.Thirty minutes __________ not a short time.You must ______ good care of it.
A.are,make B.is,make C.are,take D.is,take
2.All the ________ teachers and ________ students took part in the game.
A.man,boy B.men,boys C.men,boy D.man,boys
3.My bike was broken.I ______________ yesterday.
A.had it repair B.had it repaired C.had is repairs D.has it repaired