The boy didn’t go to school his illness(疾病).
Talking with foreigners is a useful way to ____ /ɪm'pru:v/ our English.
We should eat more fruit and vegetables to keep ______/'helθɪ/.
Please open the window and let the _____ /freʃ/air in.
Library is a good ______ /pleɪs/ to study for a test.
I go to school every day on my new _______ /baɪk/.