I was giving a talk to a large group of people, the same talk I _______ to half a dozen other groups.
| A．was giving | B．am giving |
| C．had given | D．have given |
Everyone is different and that is ________ makes our world so much better.
| A．that | B．which |
| C．what | D．who |
______ is generally accepted, economic growth is determined by the smooth development of production.
| A．What | B．That | C．It | D．As |
We are taught that a business letter should be written in a formal style _____ in a personal one.
| A．rather than | B．other than |
| C．better than | D．less than |
Maria has written two novels, both of ________ have been made into television series.
| A．them | B．that |
| C．which | D．what |
Living in the central Australian desert has its problems, _____ obtaining water is not the least.
| A．of which | B．for what |
| C．as | D．whose |