Choose the correct variant.
Modern smartphones are designed _______ even when several applications run at the same time.
A skilled health care _______ must combine knowledge with practical experience.
Constitutions are meant to _______ the relationship between citizens and the state.
The professor tried to _______ the complex principles using simple examples.
In biology, all organs and systems are _______.
The company plans _______ new software to improve productivity.
Before publishing the report, auditors must _______ all figures and calculations.
Teachers regularly _______ students’ understanding to improve lessons.
Economic development can help _______ across the population.
Smoking can _______ serious health problems.
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