Complete the passage by filling in the blanks with the most appropriate words.
Tea and coffee are consumed daily by millions of people and are integral to various cultural rituals. The consumption of tea, particularly in countries like China and India, is deeply rooted in history and tradition. However, coffee has become a staple in Western countries, especially in the form of espresso and cappuccino. Both beverages have been credited with providing an energy boost, as they contain caffeine, a natural stimulant that A the central nervous system.
While many people enjoy tea for its calming and soothing qualities, coffee is often preferred for its stronger, more stimulating effects. Some studies suggest that tea, especially green tea, has a higher concentration of antioxidants, which B contribute to improved health. Coffee, however, has been linked to several health benefits, such as improving C (Cognitive) function and reducing the risk of certain diseases. Despite these benefits, excessive consumption of both drinks may lead to negative health effects like insomnia, anxiety, and digestive issues.
Interestingly, both tea and coffee are also known for their social functions. In many cultures, drinking tea or coffee serves as a moment of relaxation or a way to bond with others. These drinks are commonly shared during breaks at work or in social gatherings, making them an important D in daily life.
Whether consumed for energy, socializing, or health, tea and coffee are beverages that have stood the test of time, continuing to E (influence) people's routines and habits worldwide. Their global significance is undeniable, and their popularity only seems to expand.
Fill in blank (A) with the correct verb form to complete the sentence.
Show answer & explanation
Correct answer: A
Explanation
Correct Answer
stimulates
Explanation
The sentence states a general scientific fact about caffeine. General facts are expressed in the simple present tense. Since the subject is 'a natural stimulant' (singular), the verb should be 'stimulates.' Thus, the sentence reads:
'Both beverages have been credited with providing an energy boost, as they contain caffeine, a natural stimulant that stimulates the central nervous system.'
The other options are incorrect. Option 2 ('has stimulate') is grammatically incorrect. Option 3 ('stimulated') is in the past tense. Option 4 ('stimulating') is a participle and cannot function as the main verb in this sentence.
Key Points
Use the simple present tense to express universal truths and scientific facts. A singular subject takes a singular verb, so 'a natural stimulant' → 'stimulates.'