The law equal rights for men and women.

permits

confirms

guarantees

考查動詞辨析。句意：這個法律確保了男女權(quán)利平等。A.permit允許；B.confirm證實，證明；C.persever堅持；D.guarantee保證，擔(dān)保。分析句意可知，空格處為動詞做謂語，其主語為the law,為單數(shù)則謂語動詞用第三人稱單數(shù)形式。又因the law作用是保證公平。故選D項。

They elected him captain of the team for second time.

the; a

a; the

a; a

/; a

考查冠詞的用法。句意：他們再次選他當(dāng)隊長。職位，官銜前面不加冠詞，a second time表示“又一次，再次”；the second time表示第二次（順序）。故選D項。

Great amounts of water poured into the river from the factories two years ago.

was

were

has been

have been

考查時態(tài)和主謂一致。句意：兩年前，工廠將大量廢水排入河中。根據(jù)two years ago 可知，句子使用一般過去時。....amounts of修飾不可數(shù)名詞作主語時，謂語動詞用復(fù)數(shù)形式，即謂語動詞與amounts保持?jǐn)?shù)的一致。故選B項。