---- air and water are very important for us.A.A B.An C.The D./_英语解答

---- air and water are very important for us.
A.A B.An C.The D./

人气：329 ℃　时间：2020-04-08 05:47:52

解答

很明显,后面谓语动词用are,说明主语是空气和水这两样,且此处没有特指因此不需the,又是不可数名词,也不需定冠词a、an,因此不填