It’s _________unlucky day today because I lost_______useful book.
—It’s too difficult for me ___the task in such a short time. —Cheer up,I am sure you can.
May I have a rest?I have already finished____the report.
His success on science____working hard.
He____the city as soon as he came here.
I was afraid ____speak English in class,because I was afraid ___being laughed at.