语法填空
1. Modern methods of tracking polar bear populations have been employed only since the mid-1980s, and are expensive __________(perform) consistently over a large area.
2. Scientists have responded by __________(note) that hungry bears may be congregating(聚集) around human settlements.
3. A 90-year-old has been awarded “Woman Of The Year” for __________(be) Britain’s oldest full-time employee—still working 40 hours a week.
4. Picking up her “Lifetime Achievement” award，proud Irene ___declared__(declare) she had no plans __________(retire) from her 36-year-old business.
5. When we got a call __________(say) she was short-listed，we thought it was ___a__ joke.
6. On our way to the house，it was raining ___so__ hard that we couldn't help wondering how long it would take __________(get) there.
7. On the last day of our week-long stay，we _were invited__(invite) to attend a private concert on a beautiful farm on the North Shore under the stars，__________(listen) to musicians and meeting interesting locals.
8. When the children are walking or __________(cycle) to school on dark mornings,…
9. But some students didn't want __________(wear) the uniform.
10. Nervously __________(face) challenges, I know I will whisper to _myself_(I) the two simple words “Be yourself”.