I have ______eight﹣month﹣old sister and she is very lovely．（　　）

A．aB．anC．the

Look! Trees are green and flowers are everywhere．

______beautiful place it is!（　　）

A．How aB．WhatC．What a

Did you see the sign "No Swimming"？You ______swim in this river．（　　）

A．needn'tB．mustn't

C．don't have to

Chinese ______by more and more people around the world．（　　）

A．is spokenB．speakC．speaking

Mum， I'd like a cup of coffee．

Dear， why not drink some water？It's ______than coffee．（　　）

A．healthyB．healthier

C．the healthiestD．healthy