--- What do you think of the standard of the new curriculum(课程)? --- It is certain to have a great _______ upon the future of both teachers and students.
--Alice, why didn't you come yesterday? --I _________, but I had an unexpected visitor.
--I'll be away on a business trip. Would you mind looking after my cat? --Not at all._________.
The clock has three hands _________.
This kind of weather isn't fit _________ us _________.
I can hardly hear the radio. Would you please _________