—What’s the matter with you ? —Oh, I’m not feeling well in the stomach . I_________so much fried fish just now .
Your English teacher looks very young; He _____ be over 30.
——Need I clean the room now? ——Yes, you _____ , but you ______ ask someone to help you.
——Don't forget to come to my birthday party tomorrow.——______.
What do you think ______ an apple ______ to the ground?
Why do you think ______ cut down the big tree?