Which sentence is the topic sentence?
A. The essence of many perfumes comes from the oils in the petals of fresh flowers, such as the rose, carnation, and orange blossom.
B. However, fragrances are not limited to the petal, but can come from the leaves of lavender, peppermint, and geranium.
C. Also, the oils of cinnamon and balsam are derived from bark, while the oils of cedar come from its wood.
D. The fragrance of ginger and sassafras comes from roots, and orange, lemon and nutmeg come from fruits and seeds.
E. There are many sources from which to derive fragrances for perfumes.
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(In the following topic sentence, the controlling idea is "Digitalization".)Digitalization makes it easy for people to get access to the reading material.
A. √
B. ×
The CONTROLLING IDEA in the sentence “There are several advantages to read extensively” is__________.
A. why should we read extensively
B. there are
C. several advantages
D. to read extensively
The TOPIC in the sentence “Air pollution in Beijing is due to a number of reasons” is__________.
A. due to
B. air pollution in Beijing
C. the reason for air pollution
D. a number of reasons
The TOPIC in the sentence “Guangzhou and Shanghai share a lot in common” is__________.
A. Guangzhou
B. Guangzhou and Shanghai
C. Shanghai
D. share a lot in common
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