They got two free tickets to Canada, otherwise they______ able to afford to go.
---- Don't you think it necessary that he _______ to Miami but to New York? ---- I agree, but the problem is ________ he has refused to.
The place _______ the bridge is supposed to be built should be ________ the cross-river traffic is the heaviest.
---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned. ---- Oh, dear! She _______ a lot of difficulties!
In our childhood, we were often _______ by Grandma to pay attention to our table manners.
They _______ on the program for almost one week before I joined them, and now we ________ it as no good results have come out so far.