LIFE ON OTHER PLANETS. TEST 1.

11. - BAI TAP TIENG ANH LOP 9 TRAC NGHIEM TU BAI 1 10
Lớp 9 BAI TAP TIENG ANH LOP 9 TRAC NGHIEM TU BAI 1 10

11. UFOs mean … flying objects .

a. unknown b. unidentified c. unable d. unimaginary.