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
I like hiking in the forest because the air is pretty ______．（ ）
A．freeB．dirtyC．pollutedD．fresh
﹣______ do you usually share happiness with？
﹣My parents and my best friend．（ ）
A．WhoB．WhoseC．WhatD．How
Nancy took her temperature and found she had a ______．（ ）
A．coughB．toothacheC．coldD．fever
David is ______ eight﹣year﹣old boy with short black hair．（ ）
A．/B．aC．anD．the
Could you please tell me how to get to the restroom？
____．I'm not sure how to get there．（ ）
A．SorryB．OKC．Of courseD．No problem