Recently, there have been many occasions ______ you have attended events on your own.
A. where B. which C. when D. why
C
【解析】
試題分析：考查定語(yǔ)從句。定語(yǔ)從句“you have attended events on your own”不缺少成分，排除B；occasion時(shí)刻，場(chǎng)合，機(jī)會(huì)，先行詞指時(shí)間，且定語(yǔ)從句不缺少主語(yǔ)或賓語(yǔ)，用when引導(dǎo)定語(yǔ)從句，故選C。
考點(diǎn)：考查定語(yǔ)從句
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