________ your son is well again, you no longer have anything to worry about.
A．IfB．whenC．Now that D．As soon as
C
考查連詞。A如果；B當(dāng)…時(shí)；C既然；D一…就；句意：既然你的兒子身體已經(jīng)好了，你不在有什么要擔(dān)心的了。
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