患者左下领阻生智齿为三根,拔除过程中远中舌根折断约3mm 根尖无病变采取的最佳治疗方案是
A. 根钳拔除
B. 根挺拔除
C. 翻瓣去骨拔除
D. 延期拔除
E. 不予拔除暂观察
25. If Mary had _________ the situation to Tom, he would have understood it.
A. supplied
B. explained
C. charged
D. thrown
26. I'm pleased to receive your letter of April 10th , _________ for our catalogue and price-list.
A. ask
B. asked
C. to ask
D. asking
27. __________your trip is short or long, we can work out a schedule for you.
A) Whether
B. what
C. how
D. which