I think everyone should donate blood _____ he is healthy because that’s a citizen’s responsibility.
A．a(chǎn)s if B．a(chǎn)s long asC．now thatD．in order that
B
考察連詞辨析。A似乎；B只要；C既然；D為了；結(jié)合句意可知B正確。句意：我認為只要健康，人人都應該獻血，因為那是公民的責任。
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