In my opinion, all Mr Tom ______ good to his students in his class at present. He is very strict in their study.
He was fortunate ____ he did not get injured in the car accident.
He hasn’t decided _____ he will go abroad next year.
The old man turned his business over to his younger son, ________made his elder son discouraged.
Stand _____ you are, and I will come and help you.
Keep away from the dog , _______it will bite you.