—How unhappy your roommate looks!
—Yes, but he's not willing to tell me what it is _______ is troubling him.
| A．what | B．which | C．as | D．that |
The people in the disaster areas are ready to accept _______ help they can get.
| A．whichever | B．however | C．whatever | D．whenever |
I like the book so much that I'll buy it, _______.
| A．no matter how it may cost | B．how may it cost |
| C．how much may it cost | D．however much it may cost |
Lin Dan has become the best badminton player, he wanted to be.
| A．who | B．which | C．what | D．that |
The typhoon（台风） left, a lot of damage to this area .
| A．caused | B．to have caused | C．having caused | D．to cause |
_____ in a white dress, the bride(新娘) looks very happy.
| A．Dressed | B．To dress | C．Dressing | D．Having dressed |