精英家教網 > 高中英語 > 題目詳情
If you are in any doubt as to _____ you should be doing these exercises, consult your doctor.
A．thatB．whichC．whatD．whether
D

試題分析：考查賓語從句。Whether引導賓語從句whether you should be doing these exercises;句意：對于你是否應該做這些實驗，如果你有任何疑問，請咨詢你的醫(yī)生。故D正確。
點評：對賓語從句的考查主要集中在語序和考查和連接詞的詞義辨析上。
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