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。
Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.
Whataniceday!Howaboutthethreeofus_____awalkintheparknearby.
Shehiredalawyertoinvestigate,onlytolearnthatGabrielhadremovedhernamefromthedeed.Theinfinitiveverbphrase“onlytolearn”isused____.
You____that letter to James. However ， you didn't.