Camels have three eyelids to ________ themselves from the blowing sand.
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.
He made up his mind to devote all he could _____ his spoken English before going to college.