Is the woman Miss Zhao？
It ______ be her．She has gone to Qingdao for a meeting．（ ）
| A． |
can't |
B． |
needn't |
C． |
must |
D． |
may |
Who taught you to use Wechat（微信）？
Nobody． I learned it by ___________．（ ）
A．IB．meC．myself
I enjoy having____________ breakfast with my family at home． It makes me feel relaxed．（ ）
A．WhoB．theC．/
This year many doctors have become anti﹣epidemic（抗疫）heroes．We are proud of____________．（ ）
A．herB．himC．them
I like history， so I to Human Museum many times． （ ）
A．have beenB．have goneC．went
We are supposed to care about the workers keep our city clean．（ ）
A．whichB．whoC．whom