Ⅰ. 单句语法填空
1. In the zoo, the number of visitors is tightly limited(limit) to avoid putting stress on the animals.
2. Why should money, time and effort be spent exploring (explore) space?
3. The fact that they reacted (react) so differently showed that they had different values.
4. Among the guests at the party, the pianist was the most impressive(impress).
5. It’s very convenient (convenience) for you to carry a computer during your travel, for you can use it wherever there is electricity.
