David is ______ eight﹣year﹣old boy with short black hair．（ ）
A．/B．aC．anD．the
________ 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
Could you tell me____？
You will stay with an English family and take part in their daily life．（ ）
A．when I should pay for the course
B．what the best part of the course is
C．how long the shortest course lasts
D．where I can go sightseeing after class