19. The language used in advertisements differs from____________used in ordinary readings.
| A．which | B．what | C．that | D．It |
I’m curious to know ______ it is ______ has made Anne_____ she is today.
| A．what; that; what | B．what; what; who |
| C．that; what; who | D．that; what; who |
Help disabled people whenever you can ______ you will make the world a nicer place to live in.
| A．unless | B．or | C．and | D．but |
___ that may generally reduce the amount of labor needed on construction sites by 90 percent.
| A．So clever the construction robots |
| B．Such construction robots are clever |
| C．So clever are the construction robots |
| D．Such clever construction robots are |
___ most of the earth’s surface is covered by water, fresh water is very rare and precious.
| A．As | B．Although | C．If | D．Once |
Helen was much kinder to her youngest son than to the others, ______, of course, made the others envy him.
| A．who | B．which | C．what | D．that |