Every possible means _______to prevent the air pollution, but the sky is still not clear.
| A．are being used | B．have been used | C．has been used | D．had been used |
Don’t leave the water______ while you brush your teeth.
| A．run | B．being running | C．to run | D．running |
My time is very ________,I can only spare you ten minutes for an interview.
| A．cheerful | B．dull | C．dear | D．precious |
There are a few books on the shelf. But only one of them is________.
| A．worth to be read | B．worth being read |
| C．well worth reading | D．worth read |
—- Have you moved into the new house?
--- Not ye
t, the rooms _____．
| A．are being painted | B．are painting |
| C．are painted | D．are being painting |
The artist made up his mind to devote all he could ______ his English before going abroad．
| A．improve | B．to improve | C．to improving | D．improving |