﹣Tom， do you know____？
﹣In Beijing．（ ）
A．where will the 24th Winter Olympics be held
B．where the 24th Winter Olympics will hold
C．where the 24th Winter Olympics will be held
D．where will the 24th Winter Olympics hold
Our country is taking action to ______ air pollution．（ ）
A．cut downB．cut upC．cut outD．cut off
The girl in the classroom ______ be Sarah．She has gone to the library．（ ）
A．mayB．mustC．can'tD．needn't
We have worked so long．Shall we stop ______ a rest？（ ）
A．haveB．to havingC．havingD．to have
Rules are helpful to us，______ we have to follow them．（ ）
A．soB．butC．orD．because
Tim is going to give his father a surprise ______ Father's Day．（ ）
A．inB．atC．onD．by