—You may find the key to the math problem on page 107.—Ah, it's so simple. I wonder why I _ of that.
______ be laughed at by his mates, he kept about quiet about punishment.
It was __________ computer games that cost the young man a lot of precious time that he should __________ on his lessons.
Only ________ we will invite.
–My uncle will be here to attend a meeting tomorrow. --Oh, I though that he____ today.
______ number of people who use English as ______ second language is increasing in China.