When I said someone broke the school regulations, I ______ you. Why did you get that angry?
| A．don’t refer to | B．haven’t referred to | C．wasn’t referring to | D．hadn’t referred to |
I can’t _____ you running up and down all day long.
| A．permit | B．let | C．have | D．allow |
Why do you have the water _____ all the time?
| A．ran | B．to be running | C．running | D．being running |
Deeply _____, I thanked him again and again.
| A．move | B．moved | C．moving | D．to move |
_____ if he had any difficulties, he made no answer.
| A．Ask | B．To ask | C．Asked | D．Asking |
_____ hard, you will succeed.
| A．Having worked | B．Being worked | C．To working | D．Working |