—— I can’t get through to the general manager’s office anyhow.
—— The line is busy. Someone _____ the telephone.
| A．must use | B．uses | C．must have been using | D．must be using |
Air and the sun's rays create much distortion, and whatever tends to _____ their influence is useful to the astronomer.
| A．exclude | B．eliminate | C．extinguish | D．impose |
His job at the hospital did not pay much, so he found another _____.
| A．on the rise | B．on the spot |
| C．on the decline | D．on the side |
Because the children keep interrupting her whenever she reads a book, she is always _____ her place.
| A．loosing | B．missing | C．losing | D．looking for |
Russia's withdrawal of its experts from China did not strangle (压垮) the Chinese people; _____ it stirred up their enthusiasm for greater exertions.
| A．on the other hand | B．on the contrary |
| C．to the contrary | D．in consequence |
The shop-assistant was straight with his customers. If an article was of _____ quality, he'd tell them so.
| A．humble | B．minor | C．inferior | D．awkward |