Read, then choose the best answer by circling the corresponding letter A, B, C, or D.
Radar is an electronic device that can “see” great distances (1) ……. fog, rain, snow, cloud, and darkness. It can find and (2) ……… locate missiles, aircraft, ships, cities, rainstorms, and mountains. Radar uses radio waves, (3) ……….. light waves, which the human eye uses in seeing. This makes it (4) …….. for radar to locate many kinds of objects at (5) …….. greater distances than the eye can see. Radar became an important military device during World War II. Today, networks of radar lookout stations guard the United States and Canada 24 hours a day against (6) ……. missiles and airplanes. Patrol planes and ships (7) …….. the oceans with radar for hostile ships and aircraft. Airports use radar to (8).…. planes safety to earth in fog or storms. Ships use it to steer clear of other (9) ……… or icebergs. Radar helps weathermen warn of (10) ……. hurricanes or tornadoes.
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Lời giải:
Báo saiGiải thích: trước động từ là trạng từ
Tạm dịch: Nó có thể tìm và định vị chính xác tên lửa, máy bay, tàu, thành phố, mưa bão và núi.