下列加线字的注音不正确的一项是（ ）

The fact that so many people still smoke in public places____ that we may need a nationwide campaign to raise awareness of the risks of smoking.

__ the problem of land erosion getting more serious, the government is searchingfor a way to deal with it.

Someone is knocking at the door.—- It ______ be Tom. He is still in the school.

s a billion dollars while Kate has amillion, so Kate is ________than Bob.