_____ puzzles me most is that I don’t know ______ the difference between the two lies.
Hi, Doctor Wang, my chest _______ when I make a deep breath.
Her shoes ________ her dress; they look very well together.
Don’t be discouraged. ________ things as they are and you will enjoy every day of your life.
What are you doing out of bed, Tom? You’re ________to be asleep.
In my opinion, learning is lifelong and the more knowledge you get, ________ .