________ unusual year 2020 is!
Yeah! The pandemic （大疫情） is a challenge not only to China but also to the world．（ ）
A．WhatB．What anC．What aD．How
Please mind your head， sir．
________．（ ）
A．It doesn't matterB．Thanks a lot
C．Don't mention itD．I'm afraid not
May I help you， young lady？
__________．（ ）
A．Good for youB．Well done
C．Yes， pleaseD．Take it easy
Mum，I failed the exam again．
．（ ）
A．I'm sorry， tooB．Not at all
C．Hard to sayD．Don't worry
I think my English teacher is nice．
_______． He can make his classes interesting．（ ）
A．I'm afraid notB．I think so
C．I don't think soD．I'm not sure
How do you celebrate______？
We usually eat zongzi and watch boat races．（ ）
A．the Spring Festival
B．the Mid﹣Autumn Festival
C．the Lantern Festival
D．the Dragon Boat Festival