You____that letter to James. However ， you didn't.
A、oughttowriteB
「句意」你本应该给詹姆斯写信，然而，你没写。
「难点」oughttohavewritten是虚拟语气，与本句句意相符。
John'sscoreonthetestisthehighestintheclass;（）helastnight.
We can hear____from the back of the room.
MissGreenwas（）$100fordrivingafterdrinking.
Ifasubstanceisdissolvedinwaterorheated，itmay（）agas.
Thebackgardenofourhousecontainsalawn，（）verypleasanttositoninsummer.
