The platform would collapse if all of you （）on it.
A、
stand
B、
stood
C、
would stand
D、
had stood
【正确答案】：B
【题目解析】：
句意：要是你们所有人都站上去，平台就会倒塌。考察虚拟语气，主句用would do的形式，从句用if+一般过去式的形式，故选B。
The platform would collapse if all of you （）on it.
The platform would collapse if all of you （）on it.
stand
stood
would stand
had stood
句意：要是你们所有人都站上去，平台就会倒塌。考察虚拟语气，主句用would do的形式，从句用if+一般过去式的形式，故选B。