单项选择题
A defect of vision prevents him from （）his eyes accurately on an object.
A.emphasizingB.relaxingC.focusingD.achieving
单项选择题 Susan has not been officially （）to Johnson.
单项选择题 We could see only the （）outline of the mountain in the distance.
单项选择题 （）with his new teaching method，we need to take a critical look at our traditional ones.
