一项调查表明，一些技术类期刊每一份杂志平均有5到6个读者。由此可以推断，在《小说月报》10000订户的背后约有50000到60000个读者。上述估算的前提是：

There were many more people who got injured in the big fire than _______.

On hearing a great noise, Mike looked forward through the window _____ what happened outside the room.

We need a more capable leader, ______ with strong will and as well as good humour.

A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.