YouthatlettertoJames.However,yodidn't().
A、oughttowriteB
「句意」 你本应该给詹姆斯写信,然而,你没写。
「难点」 ought to have written 是虚拟语气,与本句句意相符。
Ifasubstanceisdissolvedinwaterorheated,itmay()agas.
Toobtainasatisfactoryresult,onemustapplytwo()ofpaintonacleansurface.
Thebackgardenofourhousecontainsalawn,____verypleasanttositoninsummer.
Although____Spanish,heattendedthecourse.
一女性患者,50岁.有风湿性关节炎史,现心悸不安,胸闷不舒,心痛时作,舌质紫暗,脉涩,其治疗应选用