7．-Do you know ________？-Since last year．（　�。�
A．when he joined the army
B．when did he join the army
C．how long has he been in the army
D．how long he has been in the army

分析 --你知道他在部隊(duì)多長(zhǎng)時(shí)間了嗎？
自從去年以來(lái)．

解答 答案：D．
根據(jù)Do you know，可知本句考查了賓語(yǔ)從句的用法．在賓語(yǔ)從句中所使用的語(yǔ)序應(yīng)該是陳述句語(yǔ)序，選項(xiàng)BC是疑問(wèn)句語(yǔ)序，排除掉．再根據(jù)Since last year，可知這里since后面跟一個(gè)過(guò)去的時(shí)間，通常用于現(xiàn)在完成時(shí)之中，構(gòu)成：have/has+動(dòng)詞的過(guò)去分詞，提問(wèn)一段時(shí)間應(yīng)該用how long．故選D．

點(diǎn)評(píng) 此題考查賓語(yǔ)從句．考生在答題時(shí)要注意"賓語(yǔ)從句必須采用陳述語(yǔ)序"，根據(jù)上下文語(yǔ)境確定合適的選項(xiàng)．

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