He sometimes goes to school_______ underground, but sometimes he _______ a bus.

Ty to sing more English songs , and you will find it interesting _______ a foreigh language.

__________for over 3 months, the poor boy was still unconscious[ ]

. The boy lost his parents in such a terrible earthquake, so he was ______by the government.

－ _______does Nancy help the old lady with her housework－ About twice a week.