A bonus of five points can be added to a student's exam score as a_______ for good handwriting.
——The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?——____ my students have a try?
——What should I wear to attend his wedding party?——Dress ____ you like.
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
——How much vinegar did you put in the soup?——I’m sorry to say, ____. I forget.
We hope to go to the beach tomorrow, but we won’t go ____ it’s raining.