You _______ here last week if you were really worried about your work.
The number of guests invited to the party______ fifty, but a number of them______ absent.
The manager asked me whether I _______ good at computer science.
–Whose advice do you think I should take?–______.
-- What about _______ concert?--Jay Chou’s (周杰伦) concert? I didn’t go to it. To tell the truth, to buy _____ ticket of his is out of my reach at the moment.
At the railway station,the mother waved goodbye to her son until the train was .