The possible benefits of cloning are numerous , for______ producing human tissues and organs for transplant, and for preserving endangered animal species to name but two

, it is a wonderful place because younever know what it may have_______.

Because of the hard work of the farmers, the desert finally ______ rich farmland.

Mr. White , many customers want to see you._______ they wait here or outside?

It’s said that Lucy’s mother took upa fruit-picking job for two years in a foreign county and it is awork