YouthatlettertoJames.However，yodidn't（）.
B
「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。
The teachers’union _________ a lawsuit against the district calling for repairing “deplorable” school conditions.
Arriving at the bus stop, _____ waiting there.
I was to have made a speech if _____.