—I'm sorry to interrupt you, but I don't follow you now.
—Sorry, I _____ it clear about my plan.
| A．didn't make | B．hadn't make | C．wasn't making | D．haven't made |
If we keep wasting so much energy, ________are that our oil wells will dry up and the environment will be destroyed.
| A．problems | B．difficulties | C．questions | D．chances |
You may imagine what great difficulty I had ________ complicated ideas in simple English.
| A．expressing | B．to express | C．expressed | D．express |
The incomes of skilled workers went up. ________，unskilled workers saw their earnings fall.
| A．Moreover | B．Therefore | C．Meanwhile | D．Otherwise |
The further falling of the stock market as reported today has ________ a fresh wave of selling.
| A．given off | B．set off | C．put off | D．got off |
I'm interested in a single room. Do you have any ________？
| A．convenient | B．available | C．possible | D．personal |