You that letter to James. However ，yo 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。
_____ for the fact that she broke her leg, she might have passed the exam.
Frank almost never received any education,____?
His manner was so pleasant that Bolla felt at （）with him at once.
.If you have really been studying English for so long, it’s about time you _____ able to write letters in English.
If a substance is dissolved in water or heated ， it may （）a gas.
