1. It was essential that _______________(我们在月底前签订合同).
　　2. _______________(家庭人口多好还是人口少好)is a very popular topic, which is often talked about not only by city residents but by farmers as well.
　　3. We must _____________(用一切可能的办法来帮助他们).
　　4. We ________________(尽情地吃了一顿)at the new restaurant last Friday.
　　5. To most of the travelers, ________________(衣、食、住、行)are all important elements.

　　答案解析：
　　1. We sign the contract by the end of the month
　　2. Whether a large family is good or not
　　3. help them in every way possible
　　4. ate to our hearts' content
　　5. food, clothing, shelter, and transportation