If you want to go to the mountains this evening, so ______ I.
A. do B. will C. am
---Are you satisfied with the result of the competition?
---Not, not at all. I can’t have ______.
A. a better one
B. the worst one
C. a worse one
The People's Republic of China ______on October 1, 1949.
A. found
B. was founded
C. was found
______ weather stops me, I go for a walk every day.
A. Unless B. If C. As long as
---May I go out to play with my friends now, Dad?
---No. You ______ let your mother know first.
A. may B. need C. must
Look! So many passengers on the underground ______ their phones.
A. play
B. are playing
C. have played
