单项选择题One day Chuck is on a flight ______ the Pacific Ocean suddenly ______ his plane crashed.
单项选择题—Would you like to play basketball with us —Yes, I'd love to. ______ I'm afraid I have no time.
单项选择题— Sorry, I have to ______ now. It's time for class. — OK, I'll call back later.
单项选择题It's impossible for a child to do so much work within a short period of time, ______
单项选择题—What do you think of the concert —I really enjoy it. I didn't expect it was ______ wonderful.