After his wife died, he kept himself _____ from other people and the outside world,
| A．set off | B．cut off | C．put off | D．taken off |
If _______, I bet, Milinski will burst into tears.
| A．praising | B．praised | C．being praised | D．having praised |
Shortly after the book Uncle Tom's Cabin________, the Civil War of America________.
| A．came about; broke away | B．came on; broke up |
| C．came out; broke out | D．came up; broke down |
I wonder _______ there are so many natural disasters across the world in 2010.
| A．why is it | B．it is why that | C．why is it that | D．why it is that |
Into the dark apartment _______, who was quite surprised when everyone shouted “Happy Birthday”.
| A．did David walk | B．David walked | C．David did walk | D．walked David |
Sorry I’m so late, but you cannot imagine _______ great trouble I took to find your house.
| A．what | B．how | C．which | D．why |