_______ reason you may give , you ought not to have left homework unfinished.
You must be strict with your children _____________.
.John got the first prize in the speech competition, and he was so excited _____us ___theatre.
. It is necessary for us to learn _____ second language ____ our mother tongue.
Hu Mei, ___ daughter of a teacher’s family, was made ___ monitor of the class at the meeting.
Standing on the top of the hill, I would not do anything but __ the smog around me.