The explorers found island.There’s no plants on it.

A. a B. an C. the D. /

B 【解析】句意：這個探險家發(fā)現(xiàn)一個島嶼，上面沒有植物。不定冠詞a/an一個，表泛指，a用于輔音因素開頭的單詞前，an用于元音因素開頭的單詞前；定冠詞the這個，那個，通常表特指，故選B
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