Couldyouaskhimifhe_______tomybirthdaypartynextSunday?—Iwill,ifI_______himthisafternoon.[ ]

Black broke his leg. He has just had _____X-ray examination .______ doctor said he needed ______ operation.

I’ve ____ met her before, so I don’t know her.

It’s good to meet a foreigner _____ English is quite good.[ ]

Only after he had spent several nights working on the math problem_______to wonder whether the problem was wrongly set．