用所给的介词填空
介词:in,on,at,of,to,for
1.Thisistheclassroomwhichhestudiedmorethantenyearsago.
2.Thefamousplayercanplaytwochessgamesonetime.
3.Heandhistwinbrotherhavealotcommon.
4.I'llcomeconditionthatmysisterisinvite,too
5.Hearrivedattheairport6:30,justintimetocatchhisplane.
6.Youshouldgooutplayinginsteadworkingindoors.
7.Weareparticularlygratefultoyouyourtimelyhelp.
8.ThepresidentofthiscollegewillpayanofficialvisitChinainMay.
9.Hehasformedthehabitsavingmoneyandhassetasideasum.
10.Heissointerestedhisgameastoforgeteverythingelse.
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