While playing ping-pong, our eyes see the ball coming, judge its speed and then hit it back ________ it should go.
I would have come earlier, but I _____ that you were waiting for me.
_______the thick clouds, you would find the kite in the sky easily.
—What about the student in your class, Mr. Wang?—The doctor said that sleep caused him poor memory and poor concentration.
To avoid on how to use the word, you’d better refer to a dictionary.
There is a shortage of teachers in Western China, and it will fall on the 80s and 90s generations to this responsibility.