The singers _____ from the whole country are expected to bring us a wonderful performance this weekend.
19.-The book by Tony Garrison is of great use to our course.-But I think this one is_______worth reading.
18.In this experiment, they are woken up several times during the night, and asked to report what they _______.
17.-I didn't pass the English exam.-Work hard, _______you'll succeed.
16.In no place of China_______little about the economic development nowadays.
15.-Tom, you've got an A in the final English exam. Congratulations!-Thanks. But I never thought the result would come out so fast. The papers_____when I left the teacher's office just now.