There have been UFO reports for ______.
A: 15 years
B: 50 years
C: six decades
D: four decades
A: 15 years
B: 50 years
C: six decades
D: four decades
举一反三
- The two companies have been partners for ______. A: one year B: two years C: three years D: four years
- Samith warns that rising sea levels could swamp Bangkok within ______. A: 5 years B: a decade C: two decades D: three decades
- John and I have been friends for ____. A: primary school B: we were six years old C: many years
- A new president in America is elected every______. A: five years B: six years C: four years D: three years
- 4. The little boy is _________. A: four years old B: five years old C: six years old D: seven years old