Have you really realized the part computer has________ in the daily life?

—Does he know how to work out the problem? —Yes, he has _______ a good idea to solve it.

Minister Bill De Blasio     in office fewer than 48 hours when he came face to face with his biggest challenge in his life．

I wonder why Jenny ____ us recently. We should have heard from her by now. 

The famous reporter, who is said to go back to America next month, _____in China for almost twenty years.