Our country the sixth population census(人口普查)already.

I think____ important to learn English well.

Tom, why did you make no reply when I called your name in the street just now?—Sorry, Jim. I to my wife on the phone.

Mr Wang is very strict _____ us. We are afraid _____ him. [ ]

My teacher said to me with a smile, “Well, you ________ to worry about your lessons.”