（天津卷12）. I rained heavily in the south, _______ serious flooding in several provinces.
| A．caused | B．having caused | C．causing | D．to cause |
Some children want to challenge themselves by learning a language different from ______ their parents speak at home.
| A．what | B．that | C．which | D．One |
Some children want to challenge themselves by learning a language different from ______ their parents speak at home.
| A．what | B．that | C．which | D．One |
______ was most important to her, she told me, was her family.
| A．It | B．This | C．What | D．As |
_____ is known to us all is that the 2008 Olympic Games will take place in Beijing.
| A．It | B．What | C．As | D．Which |
Students are always interested in finding out _______ they can go with a new teacher.
| A．how far | B．how soon | C．how often | D．how long |