下列各句中，没有语病的一句 （ ）

________ David be the new chairperson of the Students’ Union— He _______ be, but I’m not sure.

___ the office, the foreign visitorswere shown round the teaching building.

Is there a cinema around ___ I can see a film?

You think you’re poor, but look at people in really poor countries—it’s all ____．