Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
| A．it; what | B．what; what | C．what; it | D．it; it |
—Can I help you?
—I’d like to buy a present for my father’s birthday,at a proper price,but of good use.
| A．that | B．one | C．it | D．which |
We were going to go out,butwatching TV at home because of rain.
| A．took up | B．came out | C．set out | D．ended up |
Today the world is paying much more attention to,obviously,China says
and does.
| A．that | B．which | C．what | D．how |
—Who did it?
—.you ask?It was Joe,of course.
| A．May | B．Must | C．Should | D．Need |
Her father is a famous writer,always makes her very proud.
| A．that | B．which | C．who | D．what |