(2018沈阳改编)There will be fewer workers in factories because most work ________ by robots.
A.is done B.was done
C.will be done D.will do
Tea，the most popular drink in the world，_________ by accident in China.
A. discovered B. is discovered C. will be discovered D. was discovered
I ________ the early bus. So I have to wait for the next one.
A.was missing B.missed C.am missing D.will miss
The summer vacation is around the corner. I ________ more time helping my parents on the farm.
A.spent B.am spending C.spend D.will spend
You can find Mary downstairs. She ________ the piano.
A.plays B.is playing C.played D.was playing
I ________ in the city since I left school. I like this city very much now.
A.live B.will live C.was living D.have lived
