Study hard, ________ you may catch up with your classmates soon.
Stop cutting down trees, ________ the earth will become worse and worse.
Hold your dream, ________ you might regret some day.
A.and B.or C.but D.so
Help others in need, ________ they will help you when you are in trouble.
A.and B.but C.or D.so
My brother knows a little Japanese, ________ he can understand the instructions of his camera.
A.so B.or C.but D.and
I can't find my notebook. It ________ in my home.
A.may leave B.may be left C.will leave D.will be left
