Pest Control
Paragraph 1：Many pest species that are native to North America, such as white-footed mice and ground moles, are more nuisance pests and are usually regulated by native predators and parasites. This situation is not true for nonindigenous pests in North America, such as brown rats and cockroaches. After centuries, it is evident that these pests cannot be eradicated. The best that can be done is to introduce pest control measures that will control their numbers.
1. What can be inferred from paragraph 1 about nonindigenous pests such as brown rats and cockroaches?
O Attempts to limit the size of their populations have been unsuccessful.
O They have inhabited North America longer than white-footed mice and ground moles.
O Their numbers cannot usually be controlled by native predators and parasites.
O They do not pose as many problems for humans as do white-footed mice and ground moles.
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