選B consult
翻譯 他不知道這個單詞,因此,他問我是否可以借他本字典查閱一下.
whether在這里是“（引導名詞從句)是否” 的意思.
refer是參考的意思,refer to
discuss是討論的意思,discuss with sb
排除C D
look up 查閱；（在字典中）查出
If you don't know a word,you can look it up in a dictionary.
如果你有不識的字,可以查字典.
consult是咨詢,詢問之意.
此外,也有查閱(詞典、參考書等)的意思,如
He consulted his notebook repeatedly during his speech.
他講演時不斷看他的筆記本.
consult與look up詞義不同,不可互換使用.
"consult"的含義之一是：go to a book,etc.for information,etc.即"查閱書籍等以獲得信息等".在使用及物動詞consult造句時,其賓語一般是dictionary,book,magazine,telephone directory,encyclopaedia,map,railway guide等名詞(或短語),而不是word,phrase等名詞.后者只能出現(xiàn)在由介詞for引出的目的狀語中.因此,"to consult a word in a dictio- nary"應改為"to consult a dictionary for a word".下列例句可說明consult一詞在日常生活中的具體運用：
I consulted a dictionary for the word "e-mail".我通過詞典查閱"e-mail"這個詞.
I consulted the telephone directory for his phone number.我在電話簿里查他的電話號碼.
When you don't understand the meaning of any words or terms,you should consult a good dictionary.當你不明白一些單詞或術語的含義時,應當去查閱可靠的詞典.
Consult your English dictionary when you are not sure of your pronunciation or spelling.當你不能肯定自己的發(fā)音或拼寫時,就該去查閱詞典.
I'd like to consult a train schedule for a fast train to Shanghai.我要查閱一下火車時刻表,了解開往上海的快車的信息.
"look up"的含義之一是：to try to find something in a dictionary or other reference,即"試圖在詞典或其它參考書中查找某信息".用look up造句時,其賓語應當是需要查找的某種信息,如word,phrase,idiom,slang,proverb,phone number,place name等名詞(或短語).而dictionary,book,map,telephone directory,railway guide等名詞(或短語)一般出現(xiàn)在用作地點狀語的介詞短語中.通過下列例句可了解look up在日常生活中的具體運用：
I looked up the word "expo" in this dictionary."Expo"is an abbreviation for"exposition".我在這本詞典里查到了"expo"一詞,它是"exposition"的縮寫.
I've looked up his phone number in the phone book.我已在電話簿里查過他的電話號碼了.
You can look up the place name in this map.你可以在這張地圖上查到這個地名.
May I look up the flight number on the airline schedule?我可以在航班時刻表上查閱一下航班號嗎?
以上例句表明,我們不可以將consult與look up混淆.為避免誤用,我們不妨牢記這兩種句式：
To consult a dictionary,etc.for a word,etc.
To look up a word,etc.in a dictionary,etc.