The workers have to ___rubbish to keep the mountains clean．（ ）
| A． |
stand up |
B． |
pick up |
C． |
mix up |
D． |
give up |
﹣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
﹣The school net will be shut down for safety reasons．
﹣That doesn't ____ me at all．I'm not a net﹣worm，anyway．（ ）
A．fitB．satisfyC．worry