to prepare与preparingHe stayed up last night preparing for the coming test为什么不能用to prepare

to prepare与preparingHe stayed up last night preparing for the coming test为什么不能用to prepare by failing to prepare,you are preparing to fail含义? Before Spring Festival ,people are busy .it.[a.with prepare to b.preparing for c.preparing tod.to prepare for] we are busy ( )our lessons these days.a ,prepare!b,preparing c,to prepare d,prepared she is starting___the lunch.A.preparing B.to prepare C.prepcred D.prepare I was busy___for a test last night.A.prepare B.to prepare C.preparing D.doing prepare where's your mother?She is in the kitchen,dinnerA preparing B to prepare C preparing for D to prepare for 选择We are _ for the test.A busy prepare B busy preparing C busy to prepare D busy to preparing When do you often start ___ your exams?(选择,并说明原因）A.to prepare B.preparing C.preparing for D.to prepare in Failing to prepare is prepare to fail这句话错了吧 应该是Failing to prepare is preparing to fail吧 they spent as much time as they could___their lessons A preparing B prepare C to prepare D prepared为什么? I spend much more time playing basketball than I_____for my lessons.A.spend to prepare B.do preparing C.do to prepare D.spend prepare I spend much more time playing basketball than I____for my lessonsA.spend to prepare B.do preparing C.do to prepare D.spend prepare the boy sat at the desk preparing his lessons为什么不用to prepare prepare答案改成了preparing为什么不可以改成to prepare改错 I do a lot of exercises prepare for the college entrance examination. Students are busy___the exams at the end of the termA.prepaing for B.to prepare for C.preparing to D.to prepare to all of them made great contributions (to preparing for) the 2008 Olympic Games为什么不用to prepare The secretary worked late into the night,___a long speech for the president.A.to prepare B.preparing C.prepared D.was preparing