Only then______ have a chance _____ an astronaut.
| A．I will, becoming | B．I will, to become |
| C．will I , becoming | D．will I, to become |
Paula seldom comes late for school, _______ ?
| A．isn’t she | B．is she |
| C．doesn’t she | D．does she |
I still remember the college and the teachers ___I visited in London years ago.
| A．what | B．who | C．that | D．which |
______, his leg got better and he could walk with a walking stick.
| A．Gradually | B．Unluckily |
| C．Wisely | D．Normally |
Tom is often made ______for twelve hours a day by the boss.
| A．work | B．working |
| C．to work | D．to be working |