can a tiger weigh do you know?-Yes I know that a big one can weigh over 300 kilo

问题补充：

--- can a tiger weigh, do you know?

---Yes, I know that a big one can weigh over 300 kilos.

A. How many

B. How heavy

C. How much

D. What

答案：

A. How many

B. How heavy

(答案→)C. How much

D. What

解析：句意:-一只老虎重多少，你知道吗？-是的，我知道一只大老虎可能重300多公斤。how many 多少，提问数量，修饰可数名词；how heavy 多重，虽然这个短语的意思是对的，但是因为句中有weigh，重…，故不能用how heavy 来提问；what 什么，不符合句意。故选C。