Some volunteers plan to_____ a survey about the school finishing time．（ ）
A．find outB．sell outC．take outD．carry out
Xiao Fang introduced herself to the new students in English in_________ lesson．（ ）
A．the firstB．atC．one
He knew his subject________ A to Z．（ ）
A．fromB．atC．on
You can keep one of the old photos．________ of them．（ ）
A．NeitherB．BothC．Either
We________ build our country into a country of peace，a country of wealth，a country of opening up．（ ）
A．mightB．shouldC．could
Could you please tell me ________？
For two weeks．（ ）
A．how soon he will be back
B．how long he will be away
C．how long will he be away．