________ stopping polluting the earth ________ hope to live in a better environment.
| A．Only to; we can | B．Only to; can we |
| C．Only by; can we | D．Only by; we can |
—_________ on historical facts, it's well worth reading.
| A．To base | B．Having based |
| C．Basing | D．Based |
This oil painting represents the highest level of the painter and deserves _________ a matchless piece.
| A．being called | B．calling |
| C．to call | D．having called |
The streets are named _________ the world champions who brought
reputation to the district.
| A．by | B．from |
| C．after | D．With |
The purpose of our advertising is to _________ customers’ attention to our products.
| A．pay | B．draw |
| C．devote | D．Fix |
Dad is used to _________. There's no chance that I'm able to persuade him into giving it up.
| A．smoking | B．smoke |
| C．be smoking | D．having smoked |