What are you looking ______? -My watch. I can’t find it now. Have you seen it anywhere? [ ]

Finally, put another slice of bread______ the top.[ ]

I was about to get on the bus _________someone called.

Anna is _____ to work out the math problems and gets a good grade.

In my opinion, all Mr Tom ______ good to his students in his class at present. He is very strict in their study.