.________, I have never seen anyone who’s as capable as John.

She doesn’t like the way ___ you speak to her.

I don’t know if my father ______back , but I’ll tell you if he ______back.

There is still high possibility, ________can be seen at the moment, ________ our company can beat the opponents (对手).

The death of his devoted son was a painful experience, ______ he had never fully recovered.