单项选择题

(As is known) to (all), sometimes it is very difficult (to tell) the difference between technical English (from everyday English).

A. As is known
B. all
C. to tell
D. from everyday English
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______ watching TV, you can learn about the latest news from all over the world.
A. On
B. Without
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The years passed. He gave up ______ and began
A. fly, sail
B. flying, sailing
C. to fly, to sail
D. to fly, sailing
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