--How much pepper did you put in the soup?--I'm sorry to say, ____. I forget.
Many black children died ___ cold and hunger in Africa.
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.