Relations between the two countries have ______ since the agreement was signed. A: deteriorated B: degraded C: degenerated D: decayed

If nothing is done to protect the environment, millions of species that are alive today will have become （） A: deteriorated B: degenerated C: suppressed D: extinct

If<br/>nothing is done to protect the environment, millions of species<br/>that are alive today will havebecome _________. A: deteriorated B: degenerated C: suppressed D: extinct

If nothing is done to protect the environment, millions of spiders that are alive today will have become ________. A: A deteriorated B: B degenerated C: C suppressed D: D extinct