Books are a worthy invention of human history since they make it possible for us to make a__of human’s thoughts.
By the time he arrives in Tianjing, we ____ here for two days.
Without proper lessons, you could ___ a lot of bad habits when playing the piano.
—Mr. White has decided to explore in the forest by himself.—He __ ask his brother to if he ___ go walking in the forest.
What is all this excitement about? You __ a fuss about nothing.
She is such a good boss ___ we all love and respect him. She is such a good boss ___ we all love and respect