You should _______your shoes before you enter the dance room．（ ）
| A． |
take off |
B． |
put off |
C． |
get off |
D． |
fall off |
If all business goes paperless，at least one million tons of paper a year．（ ）
A．are savingB．will be saved
C．were saved
﹣I'm feeling much better．Must I go on taking the medicine，doctor？
﹣No，you________．You'll get well soon．（ ）
A．can'tB．mustn'tC．needn't
﹣Which way do you prefer，reading online or reading on paper？
﹣______．Sometimes I read online，sometimes I read on paper．（ ）
A．EitherB．BothC．Neither
﹣It's raining hard，you should drive as _______as possible．
﹣OK，I will．（ ）
A．clearlyB．quietlyC．carefully
Taxi Apps（打车软件）can help us travel around more easily，_______more and more people like using them．（ ）
A．orB．soC．but