○testlevel1○
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第1問目
以下の文では、最後の文が未完成です。段落の下にリストされている4つの選択肢から、適切な文を選択してください。
When people began to try to create a "flying machine" in the eighteenth century, they used hot-air balloons. These balloons went up into the air but then could not be controlled. They went wherever the wind was blowing. The idea of a real flying machine remained a dream for a long time. That dream finally came true in 1903, _ when Wilbur and Orville Wright .
flew across the Atlantic Ocean.

invented a new kind of engine.

invented the hot-air balloon.

made their first successful flight in an airplane.



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