Scientists aren’t sure if his ___ is correct.
theory
mystery
ax
satellite
Sputnik was the first human-made ____.
theory
mystery
satellite
ax
He used his ____ to cut down the tree.
mystery
satellite
theory
ax
Nobody knows how the ancient Egyptians built the pyramids. It’s a ____.
theory
mystery
ax
satellite
He doesn’t know what happened, but he found an important ___.
ax
satellite
history
clue
We need to learn from ____ so that we don’t repeat our mistakes.
clue
satellite
ax
history
When ___ the Seoul Olympics take place?
did
were
Robert Ballard found the remains of the Titanic ___ 1985.
in
on
The first successful airplane flight was ____ December 17, 1903.
on
in
The last mammoth died about 3,700 years ____.
before
ago
Cleopatra ruled Egypt ___ almost 30 years.
for
from
____ did Napoleon die?
When
How long
stone, wood, plastic are examples of ...
weapons
utensils
materials
hammer, screwdriver, saw are examples of ...
utensils
tools
weapons
cell phones, tablets, laptops are examples of ...
gadgets
weapons
utensils
spoons, forks, chopsticks are examples of ...
weapons
gadgets
utensils
