Instruction
Select the best answer to complete the sentence.
1. You can complete the project without -------- difficulty only if you do it by next week.
2. Crude oil and materials have risen -------- these days in addition to the increase in taxes.
3. John is not used to -------- up late.
4. It is impossible -------- human beings to predict the earthquakes at present.
5. Do you remember -------- to the circus when you were a child?
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