How long do you think _______ the computer company turns out a new product?
| A．it will be that | B．will it be until | C．will it be since | D．it will be before |
It is considered to be almost a crime to ______ children to violence on TV.
| A．contribute | B．devote | C．prefer | D．expose |
．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 |
A successful life is a life_____ challenges are met and difficulties overcome.
| A．which | B．where | C．that | D．what |
．Sorry I’m so late, but you cannot imagine__________great trouble I took to find your house.
| A．what | B．how | C．why | D．when |
．The silence of the library is sometimes broken by a sudden cough or the sound of pages_______.
| A．turning | B．turned | C．being turned | D．having turned |