填空题将among改成amid。
填空题bulk
单项选择题A.isolationB.insecurityC.povertyD.crowdedness
填空题将with去掉。
单项选择题A.The spacecraft will fly direct to Mercury.B.The spacecraft will fly three times past Mercury.C.The spacecraft was launched a week later than planned.D.There is no specific task for this journey.