1) David is a child. (happy)

2) David is (happy).

3) They won the game (easy).

4) The view was magnificent. (true)

5) They have settled in (comfortable).

6) Everything is proceeding (normal).

7) Please drive (slow).

8) He hit the ball (hard).

9) She did in the competition. (good)

10) Please close the door (quiet).