Sam ______ some knowledge of the computer just by watching others working on it.

We expected that he ____ for the meeting.

I think he’s determined that he won’t give in — see if you can get round    the stubborn man.

Either she ______ he is fit for the job, but not me.

Though golden weeks over the past eight years have______huge returns for China's tourism industry，voices ______ cancellation of the nationwide holidays are becoming even stronger.