33. The number of children who have lost parents to AIDS ________ to rise to over 26 millionin 2011.
He can speak four languages, _______ English, French, Japanese, and Chinese.
Children under six are not _______ to school except those of extraordinary intelligence.
The protection of our environment is not _______ to be left to the government. Everyone should be concerned.
--What did you say? I’m sorry, Mrs White, but …--So you _______ to me, Peter.
Can you image that a well-behaved gentleman _______ be so rude to a lady?