单选题 Those instruments, such as the microscope and the telescope, which are essentially aids to the eye, have certain features ______.
A. in common B. by common C. under common D. among common

【正确答案】 A
【答案解析】[解析] 短语搭配题。像显微镜和望远镜这样的仪器，对肉眼很有帮助，他们有些共同点。in common固定用法，共同地。