There are many CD-ROMs in the bookshop. I don’t know ____ to buy.
Many countries have a lot of rockets into space.
—How can I learn English well? —You will learn it well ________ you practice speaking it often.
—Are you ready to leave, Helen? —_________ —I was just asking if you’re ready to leave.
—Could you tell me _______ to have the picnic? —Near the South Beach.
—I’m leaving for Qingdao tomorrow. —