David had prepared carefully for the exam so that he could pass it at his first ________.
-----What do you think of the materials _____ these clothes were made? ----- They feel _____.
Through the reform, the economic situation of China ____ much better than it used to.
No one noticed him _____ in.
-----What are you afraid ______? -----I’m afraid ______ dogs.
-----I just heard that the tickets for tonight’s show have been sold out. -----Oh no! ______.