With the development of the technology, nobody knows ________ the world will be like.
that
what
how
–How does Jack usually go to work? —He ______ drive a car, but now he ______ there to lose weight.
—Why are you so tired these days? —Well, I have ________ homework to do.
___his surprise, she succeeded in climbing up the high mountain.
What’s_________ with you?
My grandparents are very healthy. They always ______ after school.