1 . Boys of five to eight years old are very ________ (energy) and they seem to have limitless energy. (所给词的适当形式填空)

2 . The house which belongs ________ my grandparents is still well preserved. (用适当的词填空)

3 . Please contact the company at your earliest ________ (convenient). (所给词的适当形式填空)

4 . I am quite ________ (satisfy) with the results of the test. (所给词的适当形式填空)

5 . The number of friends invited was fifty, and a number of them ________ (be) present ahead of time.

6 . She was ill and that was ________ she was helped upstairs last night.

7 . Ten minutes has been made full use of ________ (study) the problem.

8 . You speak English very ________ (native)! How can you make it?

9 . He usually speaks ________ dialect, so it is hard for everyone here to understand him.

10 . After 25 years the town center has changed beyond ________ (recognize).