Could you tell me why you learn English so well？
It's very simple， you study， grades you will get．（ ）
A．The harder； better
B．The harder； the better
C．Harder； better
D．Harder； the better
I didn't know anyone at the party， I felt a bit lonely．（ ）
A．orB．soC．andD．but
Thanks for helping ， Mary． I have improved my English a lot．（ ）
A．meB．youC．himD．her
To our surprise， the computer won the chess game against the human player．（ ）
A．certainlyB．usuallyC．finallyD．mostly
In order to sell more products， we need to come up with more ideas．（ ）
A．trueB．commonC．simpleD．creative
This is a private letter Tom． Nobody else can open it．（ ）
A．forB．withC．fromD．about