Emily， you are playing video games again! Study hard， ______ you will fail in the coming
exam．（ ）
A．thenB．soC．andD．or
The Caspian Sea is ______ than any other salt lake in the world．（ ）
A．deepB．deeperC．deepest
The 31st Olympic Games will be held in Brazil ______ August 5th，2016．（ ）
A．inB．onC．at
There are some ______in the garden．（ ）
A．potatoB．potatoesC．potatos
Could you please take ______notebooks to the teachers' office？（ ）
A．youB．yourC．yours
I often play ______chess after class．（ ）
A．aB．theC．/