new study says that going to bed late is harmful to our health.

A. /;/ B. A;/ C. A; the D. The ; the

B 【解析】 句意：一項(xiàng)新的研究表明，晚睡對(duì)我們的健康有害。考查冠詞。a/an是不定冠詞，表示泛指，a用于以輔音音素開(kāi)頭的單詞前面，an用于以元音音素開(kāi)頭的前面；the是定冠詞，用于特指。第一個(gè)空格，一項(xiàng)新的研究，是泛指，而且new是以輔音音素開(kāi)頭的單詞，所以用a；第二個(gè)空格，go to bed上床睡覺(jué)，是固定詞組；因此這句話的意思是：一項(xiàng)新的研究表明，晚睡對(duì)我們的健康有害。故答案選B...
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