We have entered a world where robot operations become true with 5G technology．
Hard to believe! Scientists are full of which leads to great changes in our life．（ ）
A．attractionB．invention
C．positionD．contribution
Do you enjoy yourself at the concert？
Yes．I have never been to _____ one before．（ ）
A．a betterB．the bestC．a worseD．the worst
I've bought all the food for the party tonight．
Thank you．Then I ____ go to the supermarket．（ ）
A．can'tB．mustn'tC．shouldn'tD．needn't
Our teacher ______ a bookshelf at the back of our classroom to make a small reading corner．（ ）
A．picked upB．put upC．took upD．got up
Though Kongfu Panda 3 is popular with teenagers，it won't be liked by ______．（ ）
A．nobodyB．somebodyC．everybodyD．anybody
The Great Wall runs about 21,200 kilometres．
Wow! ______________．（ ）
A．It's OKB．Good idea
C．That's amazingD．You are welcome