The new machine，if _________ properly，will work at least ten years.
| A．use | B．using |
| C．being used | D．used |
left the door unlocked must be held responsible for the accident.
| A．Whomever | B．Whoever | C．Whatever | D．Whenever |
If we use the new recycling method, a large number of trees.
| A．are saved | B．will save | C．will be saved | D．have saved |
．She is fed up with sharing a house with others; , she is looking for her own flat.
| A．moreover | B．otherwise | C．however | D．therefore |
—What’s wrong with your ipad? The soundis not clear.
—Yes. It has been broken for some time.
| A．come out | B．coming out | C．to come out | D．came out |
If you’d written earlier, I’d have known when youto go on holiday.
| A．want | B．have wanted | C．wanted | D．will want |