Not until I began to work ______ how much time I had wasted.
| A．didn't I realize | B．did I realize |
| C．I didn't realize | D．I realize |
______ the numbers in employment, the hotel industry was the second largest industry in this country last year.
| A．In spite of | B．In case of | C．In terms of | D．In favor of |
_________along the quiet road at forty miles an hour, and then an old man suddenly started to cross the road in front of me.
| A．Driving | B．When I was driving | C．I was driving | D．Having driven |
Besides proper diet, exercise is one of the key ___________of a healthy lifestyle.
| A．categories | B．components | C．ranges | D．processes |
After ten hours’ drive, we came to ______ is called a green house, through the glass wall of _____, we saw lots of green plants.
| A．where, which | B．that, that | C．what, which | D．where, that |
—Mother, I climbed up to that tall tree and picked this big apple.
—Jesus! You______ down and hurt yourself.
| A．might have fallen | B．might fall | C．must have fallen | D．must fall |