The stranger shook me by the hand warmly ___ he were to say he knew me well

I bought some fruit vegetables.

My wife’s ______ complaints about the bathroom being too small really gives me a big headache but I can’t do anything but _____ to accept it as it is.[ ]

There are ten chairs and twelve teachers here. So we need _________ chairs.

difficulty is beyond my _____, Iturn to my classmates or teachers for help