1. The next contest will be ________ (host) in Shanghai.

2. We’ve ________ (replace) the old machine with a computer.

3. Only those who have achieved good grades will be ________ (admit) to the key university.

4. He looked through the house for the two ________ (Greece).

5. Two of the ________ (compete) failed to run up for the race.

6. One of the ________ (volunteer) for the rescue work injured himself when helping others.