It is _________ to increase input in areas of innovation to ensure the country's promising prospect.
With a lot of difficult problems __________,the newly-elected president is having a hard time. A, settledB. settling C. to settle D. being settled
So many uses have been discovered for this wood __________ the supply of white pine is becoming smaller and smaller.
—I wonder why Mr. Green hasn't showed up at the meeting yet. —I'm not sure, but he __________ in a traffic jam driving here.
__________ your timely warning, we would have been unaware of the danger.
We're trying to ring you back, Bryan, but we think we __________ your number incorrectly, A. looked upB. took down C, worked out D. brought about