We are going to celebrate the 100th anniversary of the founding of the Communist Party of China _________ July 1st，2021.（ ）
A．inB．onC．atD．of
She will ______ the silk dress and go out．（ ）
A．put awayB．put upC．put on
The students in this school ______ to choose their own school uniforms．（ ）
A．are allowedB．allowed
C．are allowing
"Actions speak ______ than words，"as the saying goes．（ ）
A．loudB．louderC．loudest
We have decided to sell five things ______ we no longer use．（ ）
A．thatB．whereC．who
Brown draws a picture of the criminal，and the police put ______ on the Internet to find him．（ ）
A．himB．herC．it