The London Marathon is a difficult race.___ ___， thousands of runners participate every year.
举一反三
- The________ conference which I attend every year is going to be held in London in January next year.
- The ______conference which I attend every year is going to be held in London in January next year. A: substantial B: annual C: apparent
- Niagara Falls is viewed by thousands of tourists every year.
- Thousands of people enter the country ____ every year. This is against the law.
- The _____ conference which I attend every year is going to be held in London in January next year. A: annoy B: avenue C: annual D: angry