Download this free B2–C1 English worksheet PDF for adult learners and English teachers. This lesson is based on Google’s proposal to release up to 32 million treated male mosquitoes in parts of California and Florida as part of its Debug programme.
Students practise reading comprehension, useful vocabulary, phrase matching and speaking skills through a real-world topic about biotechnology, disease control, public health, environmental risk and public trust. The worksheet is suitable for private English lessons, online classes, advanced conversation practice and homework before a discussion lesson.
The article explains how the proposed mosquito release would work. Google’s programme uses treated male mosquitoes and the naturally occurring bacterium Wolbachia to reduce local mosquito populations over time. The aim is to control mosquitoes that can pass on diseases such as dengue, Zika and chikungunya, especially in places where traditional pesticides are becoming less effective.
This worksheet encourages learners to discuss a serious public health question in careful English: should a technology company be trusted to carry out a large biological trial near people’s homes? Students consider the possible benefits of reducing disease-carrying mosquitoes, the concerns residents may have, the role of US authorities and whether this kind of method should be rolled out more widely if it works.
The PDF includes a B2–C1 reading article, True / False questions, Phrase Match, Synonym Match, a task where students use new language, discussion questions and a full answer key. It helps learners discuss science, health policy, environmental concerns, trust in technology companies and how governments should weigh up risk and evidence.
Level: B2–C1
Date: 02 June 2026
Focus: reading, vocabulary, public health, biotechnology, mosquitoes and speaking
This free worksheet includes:
- a B2–C1 reading text about Google’s mosquito release proposal
- True / False comprehension questions
- Phrase Match practice with useful expressions
- Synonym Match vocabulary practice
- a sentence-writing task using new language
- discussion questions for Student A and Student B
- full answer key
The worksheet includes useful phrases such as asked for, carry out, cut down, pass on, die off, roll out, raise concerns, weigh up, go ahead and keep the target species in check. It also practises vocabulary such as approval, sterile, species, proposal, authorities, evidence, traditional, concerns, scalable and effective.
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