Instruction
Select the best answer to complete the sentence.
1. This old sports car uses so much gasoline that it is not -------- to own it.
2. When you are tired, you are -------- to make careless mistakes.
3. Tom is looking forward to the event because he -------- effort for the preparation.
4. Ms. Tomiya was named COO in June, and there are 80 subordinates in -------- department.
5. You should take your umbrella -------- it rains.
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