______did the rainstorm come， Mr． Liu？
While we_____a chemistry lesson yesterday afternoon．（ ）
| A． |
When； have had |
B． |
When； were having |
| C． |
While； are having |
D． |
While； have |
Because of the special situation this year， about ________ of the students in our school ________ having classes on the Internet at home． （ ）
A．two thirds；areB．two third；is
C．second thirds；areD．two thirds；is
________ 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
This year President Xi Jinping wrote a letter to the young pioneers China to celebrate ________ 70th anniversary（周年纪念日）． （ ）
A．theirB．themC．theirsD．they
What's this？
It's a paper cutting of Fu．It's a kind of art_________． （ ）
A．jobB．workC．pictureD．symbol
Tony， hurry up and don't forget to lock the door．
___．I'm getting my coat．（ ）
A．Wait a minuteB．No deal
C．Nothing seriousD．Bad luck