UFOS MEAN ……… FLYING OBJECTS. (UNKNOWN / UNABLE / UNIDENTIFIED / KN...

Lớp 9 Tiếng Anh E9 DAP AN DE THI HKII DE SO 3

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6. UFOs mean ……… flying objects. (unknown / unable / unidentified / known)

II. Complete the sentences with the correct form of verbs in the parentheses. (2 marks)