﹣Would you like to join us in the card games？
﹣ ，for I have something important to do．（ ）
A．I willB．I'd love to
C．I'm afraid not
It's necessary for students ______with their teachers．（ ）
A．communicateB．communicating
C．to communicate
It's time for I'm a Singer，please ______ the TV．（ ）
A．turn onB．turn offC．open
Yu Gong kept moving the mountains，______ he was very old．（ ）
A．soB．althoughC．but
We ______ the tea set for three years．（ ）
A．have hadB．hadC．have been
The sweater ______ belong to Jim．It's much too large for him．（ ）
A．mustn'tB．can'tC．needn't