Our teacher is very strict __________ us, and we all show our respect __________ her.
If Joe's wife doesn’t go to the party, ________.
——Did Tom come back late last night? ——No. It was not yet 8 o’clock ____ he arrived home.
Our school has about 100 computers, but only sixty percent ____ used regularly.
Imagine how excited we were ____ that our schoolmates had been admitted to some famous universities.
Mum, I need a new schoolbag. Could you buy _______ for me tomorrow?