_______ difficulty we meet with, we must finish it on time, because the opportunity is _______ valuable.

ering his health, I advisehim to ______ an hour or two each day to work out.

Smile to the world the world will smile back to you.

consensus in modern society that whoever breaksthe law deserves _______, whether he is from the top class or a humble person

My cousin _____ the English Club for almost three years. He speaks good English now.