Later she wrote us a letter, expressing her thanks to us for lending her_____ hand when she was in_______ trouble. A. /, the B. a, / C. a, the d. /, /
__________ out of work for a few months, mother took up the job of waiting on patients in the hospital.
__________ in the restaurant for half an hour, I suddenly realized I had left my wallet at home.
The young man, __________ abroad for two years, decided to go back to his motherland.
Tom returned from the manager's office, __________ me that the boss wanted to fire me.
__________ the task, they had to stay in the lab for another two hours.