單項選擇 It's--------.A.pen B.his a pen C.his pen D.a his pen

題目：

單項選擇 It's--------.A.pen B.his a pen C.his pen D.a his pen

解答：

C
百度嫌我字數不夠 再問： B 爲什麼不對
再答： his a pen 沒有這種說法。就是his pen