____ you know your potential（潜力）, you have to rely on many other people to get to where you are.
| A．While | B．Since | C．If | D．Where |
Please keep me informed_______ the change of your address as soon as possible.
| A．of | B．for | C．with | D．by |
One of the most important questions they had to consider was _____of public health.
| A．what | B．this | C．that | D．which |
The lady walked around the shops,______ an eye out for bargains.
| A．keep | B．kept | C．keeping | D．to keep |
I go _____to the stadium when there’s a game. But usually I watch it on TV.
| A．typically | B．anxiously | C．frequently | D．occasionally |
—Can you give some advice on what I said just now?
---Sorry. My mind ______.
| A．is wandering | B．was wandering | C．has wandered | D．had wandered |