Instruction

Select the best answer to complete the sentence.

1. -------- she is inexperienced as an instructor, Rachel had the ability to speak fluently in public.

2. The world is -------- with the challenge of protecting the environment.

3. Though we asked to change the schedule of the meeting, so far nothing -------- done.

4. The number of department staff was doubled to deal with the system trouble caused ------- large-scale blackout.

5. Their -------- produces products much better than theirs.

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