Question

Water, which seems so simple and common, is ______ makes life possible.

A．what

B．that

C．which

D．how

Answer 1

A

試題分析：考查表語從句：句意：看似簡單普通的水，是使得生命可能的東西。Is后面是表語從句，表語從句缺少主語，用what。選A。
點(diǎn)評：連接表語從句的連接詞有：that, what, who, when, where, which, why, whether, how, whoever，whomever，whichever ，whatever等。還有如because, as if, as though等。解答這類題目，關(guān)鍵在于分析清楚句子結(jié)構(gòu)。通過判斷引導(dǎo)詞在從句中所作的成分及意義，來選擇正確的引導(dǎo)詞。