помогите с английским!! ! пожалуйста. нужно выбрать правильную форму глагола из скобок

1.they walked out of the house on a gray winter morning. the smog ( was making, made) their eyes tear
2.christmas cards made from recycled paper (were selling, sold )well all through last week
3. the polls ( show, are showing) a promising tendency among the urban population.
4. scientists (have warned, have been warning) us about air pollution for years
5. our town (had recycled, had been recycling) paper and botteles for years before New York State (was introducting, introduced) recycling regulations. Because more people (start, are starting) to recycle, we (shall expect, shall be exprecting) more buyers to shop for recyclable productions. next may the town recycling center (will operatate, will have been operating) for ten years.
6. he (spends, has been spending) most of his time in the country lately.
7. this classroom (holds, is holding) 50 students.
8. John (lacks, is lacking) confidence
9. Today I (shall speak, shall be speaking) about the role of recycling in an urban household.
10. the Dean has just fired his new secretary. He (types, is typing ) his memos himself. - Good for him. I always (am typing, type) all my papers myself