单选题 Astronomers have leamed that the spectacular tails of comets are extremely tenuous bodies, ______ particles that the pressure of light can bend them.
A. comprising the least B. composed of such minute
C. composed of very large D. having so small number of

【正确答案】 B
【答案解析】[解析] 动词用法和连词搭配
动词-ing形式常表示伴随状态、原因等，-ed形式常表示既成状态、结果等。根据题意，本题应选-ed形式。此外，such…that为固定搭配，意为“如此……以至于”。所以B项为本题答案。