It was repairing the old clock that the old man spent the whole morning at home.为什么用REPARING

It was very late , ___ the students still went on repairing their desks and It was repairing the old clock that the old man spent the whole morning at home.为什么用REPARING 单选讲解It was ___the old clock that the old man spent the whole morning at home.A repairing B repaired C to repair D in repairing选C表示目的不可以吗？ It was ----- the old clock the old man spent the whole morning at home.A repair B repairing C to repair D in repair The car is too cold.It isn't w___ repairing 在过去将来时中 would 与was to do 有什么区别1.It was said that the machine _____sometine the next week.A.had been repaird B would repair C was to be repair D needs repairing 1.Mr.White____his television set the whole morning and he hasn't got it ____yet.A.has repaired;repaired B.is repaired;repairingC.has been repairing;repaired D.was repairing;repairing 2.口语交际题里,I'd rather 3.过去分词能否做主语?如 Susan was doing the housework while her son ____the machine.(repair)A.repairs B.repaired C.was repairing D.is repairing You look so tired.What's up?I ( ) my computer all the aftermoon.But is still doesn't work.填have been repairing还是was repairing?求解释 it was up to 的用法It was up to the US to take the initiative in repairing relations.在修复关系方面应由美国采取主动.这里的it was up to是取决与什么的意思吗?具体该怎么用? Repairing this car took him the whole afternoon.的时态,repair为什么加ing或 = It took him the whole afternoon repairing this car.为什么省略t0 NASA is now going to put the telescope right.NASA will be repairing it.翻译 Repairing this car took him the whole afternoon.用it 写出同义句 The car is too old.It isn't w______ repairing.如题 填什么 The house is too old.It requires_____.A to repair B repairing C repaired D repair Something is wrong with the tape recorder. It needs (repairing; repair). Not until the motorbike lookde almost new ()repairing and cleaning it I spend the whole day repairing the motorbike.the work was ( )simpleA nothing but B anything but请翻译