It __________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
—What were you trying to prove to the police? —______I was last night .
. —Have you received Jack’s plan ? —Yes , but I don’t think his plan is______ .
-------I bet someone stole my backpack . -------Well , you ______ have kept an eye on it .
We all know it will be next June ______ we can really have a rest .
We’ve been told the good news , but when and where to go for the exciting paid vacation______yet.