`1. Scientists have made many important new ______ of the depth by using modern devices. (discover) 2. Community police have made a very positive ______ to crime prevention. (contribute) 3. They are investigating the ______ disappearance of a young woman. (mystery) 4. By the age of eighteen he was completely ______ of his parents. (depend) 5. The ______ of the seabed is being carried out. (investigate) Yêu cầu 1 : đây là dạng gì 2 : sửa đầy đủ Thanks !

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