Which would you like to read，paper books or e﹣books？
My parents only allow me to read paper books．They____my eyes．（ ）
A．talk aboutB．hear about
C．learn aboutD．worry about
Why does the earth look blue in space？
Because most of the earth's surface ______ by water．（ ）
A．coversB．is covered
C．coverD．are covered
Look! The model is walking to us．______ nice dress!（ ）
A．WhatB．What aC．HowD．How a
What were you doing ______ I knocked at the door？
I was sleeping．（ ）
A．unlessB．onceC．whenD．while
Mount Xiaolei is not far away from here，but it will still take us a few hours ______ there by bike．（ ）
A．gettingB．to getC．gotD．get
Hi，Sara．Is this ______ English book？
No．______ is on the desk．（ ）
A．your； MineB．your；MyC．yours；MineD．your；My