填空题 This is the worker _______ _______ we have all learned a lot.

单选题 I'll never forget the time （）I spent on campus.

单选题 Dried foods are invaluable to climbers, erplorers and soldiers in battle,()little storage space.

单选题 He is interested in() have told him.

单选题 We regret（）that your application has not been successful.

单选题 Some students are good at science while（）are talented in art

单选题 How can a country where teachers devote all theirclass hours to training students to take exams（）to compete in the technology race withother countries?

单选题 He was wearing the same hat（）he'd had（）on the day before.

单选题 Beijing，()is the capital of China, is a beautiful city.