.Though the teacher had tried to make the problem easy__________, still Lily and her partner were at a loss.
A number of new machines were introduced from abroad,______ an increase in production.
Grades would______from one or two,for outstanding or excellent,to six or seven,for poor or very poor.
—I hear Tom ______ playing games recently.—______ no wonder he is easy to feel sleepy in class.
I was so excited at the news that I could hardly ______ my feelings in words.
Only by ______ your attention ______ what you are learning can you learn it well.