Tom sat under a tree and seeing his friend, ___ up in no time.
| A．to stand | B．standing | C．stood | D．would stand |
— Susan, go and join your sister cleaning the yard.
— Why ___? John is sitting there doing nothing.
| A．him | B．he |
| C．I | D．me |
The teacher doesn’t permit ________ in class.
| A．smoke | B．to smoke |
| C．smoking | D．to have a smoke |
If you keep on writing, you will have brighter future, likely to become J. K. Rowling.
| A．the; a | B．the; the |
| C．a; a | D．a; the |
The reason ____the little actress has been such a success is ____she is both clever and hard-working.
| A．why, why | B．why, that |
| C．that, because | D．for, because |
There are some health problems that, when ______ in time, can become bigger ones later on.
| A．not treated | B．not being treated |
| C．not to be treated | D．not have been treated |