People's Liberation Army (人民解放军) took part in the military parade in honor of the 70th anniversary ( 周年)of the end of World War II at Beijing's Tian'anmen Square, _____ the morning of September 3, 2015.
A．in
B．on
C．at
—Whose model plane is it? —It’s Jack’s. He made it by _______.
A. he B. himself C. his
—Excuse me, can you give me a _______? —Sure.
A. hand B. help C. ball
Mom, don’t worry ______me. I can take care of myself.
A. about B. with C. for
Do you prefer _______?
A. skate B. skates C. skating
—Must I finish my homework at once?
— No, you ______.
A. needn’t B. mustn’t C. won’t