—Can you help me with the math problem, Dad? ___________.—OK, let me think it over.
His English is very poor.He can’t make himself ___.
16.Nobody knows who is the first one to add fertilizer ___ the soil to make plants grow better.
It was five o’clock.The battle is still ___.
14.Tom’s elder sister is only one year ___ than he.
Tom’s father burst out ___ when he saw Tom eating candy happily in the police refuge for lost children.