Europe has achieved more in controlling the AIDS virus than Asia in the past ten years, ______ the number of people infected with the virus is going up sharply.
A．whenB．which C．thatD．where
D
考查定語從句關系詞的選擇。 本題關鍵在于找準定語從句所修飾的先行詞，根據(jù)句意可知，此處先行詞為Asia，在后面從句the number of people infected with the virus is going up sharply中做地點狀語，故選擇D
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