16. —You know how much I am missing the days before the pandemic.
—School, movies, gatherings, . We'll soon be back on track.
A．no kidding B．you name it C．easy does it D．go for it
17. At minus 130℃，a living cell can be ________ for one thousand years.
A．preserved B．protected C．spread D．developed
18. No matter where we go, there are always disappointments. Once we encounter them, it is easy for us to be overly________ and take things too seriously.
A．abnormal B．considerate C．responsible D．pessimistic
