It is 30 years ______ China performed the Reform and Opening-up policy ______ has had a great effect not just on China, but also on the world.
——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.