People would like to listen to officials talk____，for no one likes an endless and empty talk．
| A．seriously | B．fluently |
| C．frequently | D．Plainly |
—________ when has the country been open to international trade?
—1978，I suppose.
| A．Since | B．In | C．From | D．After |
What shall we use for power when all the oil in the world has________？
| A．given out | B．put out | C．held up | D．used up |
No matter what you do，you must ________ your mind________ it.
| A．put；to | B．keep；on | C．apply；on | D．put；into |
He thinks only of himself；he doesn’t________ other people.
| A．care about | B．care for | C．care of | D．care to |
With that calm and________ expression of hers，our anxiety almost disappeared into the air.
| A．confusing | B．determined | C．opposing | D．confused |