單選題

Husband: I’m exhausted! ____________ Wife: But it helps protect the environment. Husband: I know. Are there easier ways of doing it? It takes too much time to classify things. Plastic bottles in this bag, regular garbage in that one…. It drives me crazy. Wife: Why don’t you take a break? I’ll take care of it.

 (A) We have only one earth.

 (B) Clean air is what we need now.

 (C) I think recycling is just a waste of time.

 (D) Environmental protection is really important.