You can’t get good grades______ you study hard.
A．whenB．becauseC．unlessD．that
C

試題分析：句意：如果你不努力學(xué)習(xí)，你就不能獲得好成績(jī)。A. when 當(dāng)......時(shí)候；引導(dǎo)時(shí)間狀語(yǔ)從句。   B. because 因?yàn)椋龑?dǎo)原因狀語(yǔ)從句； C. unless 除非，如果....不，引導(dǎo)條件狀語(yǔ)從句；   D. that 那個(gè)。只是以引導(dǎo)詞。you study hard.是You can’t get good grades的條件，故用來(lái)連詞 unless。故選C。
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