He kept looking at her, wondering whetherhe her somewhere.

This pair of shoes _______ really big for me.— Why not try another _______

The physics teacher once said that we first _____the lightning followed by thunders because light ______ faster than sound.

It remains to be seen whether the plan which has been approved can be ________.It depends on your determination.

The change was so _____ that we hardly noticed it. [ ]