I think that the pyramids are amazing.
that the pyramids are amazing
I hope we visit Egypt someday.
I hope that we visit Egypt someday.
Find the noun clause: "We know that hieroglyphs are an ancient form of writing."
that hieroglyphs are an ancient form of writing
Complete: "The tourists are ___ that they saw the pyramids." (a happy feeling)
glad / happy
I think that the pyramids is huge.
I think that the pyramids are huge.
We know that the Sphinx is very old.
that the Sphinx is very old
I'm sure the Sphinx is made of limestone.
I'm sure that the Sphinx is made of limestone.
Add "that":
"It is true Egyptian scribes wrote on papyrus scrolls."
It is true that Egyptian scribes wrote on papyrus scrolls.
Complete: "___ ___ ___ that the Sphinx guards the Giza Plateau."
It is true / It is a fact
We are sure that the Sphinx very old.
We are sure that the Sphinx is very old.
The tourists were glad that the museum was open.
that the museum was open
It is true the pharaohs were buried in the Valley of the Kings.
It is true that the pharaohs were buried...
Subject + verb of the noun clause:
"Visitors are certain that the Karnak Temple has giant columns."
S: the Karnak Temple / V: has
Which one is correct?
a) Builders were sure that the stone blocks were heavy.
b) Builders were sure that heavy.
a) — a noun clause needs a subject and a verb
It is true that the pharaohs was very powerful.
It is true that the pharaohs were very powerful.
It is a fact that the Nile flows through Egypt.
that the Nile flows through Egypt
The explorers were surprised the tomb was full of gold.
The explorers were surprised that the tomb was full of gold.
Fix the mistake: "It is a fact that Egyptian art reflect thousands of years of history."

...that Egyptian art reflects thousands of years of history.
Remove "that": "I dreamed that I visited the pyramids."
I dreamed I visited the pyramids.
The tourists were glad that they visit Luxor yesterday.
...that they visited Luxor yesterday.
Historians believe that King Tut died at a very young age.
that King Tut died at a very young age
Historians are certain the Karnak Temple has giant columns.
Historians are certain that the Karnak Temple has giant columns.
Complete with your own noun clause: "Historians believe that Egyptian art ___."
Any correct clause (e.g., ...that Egyptian art shows their religious beliefs.)
Make your own sentence about Egypt with "be surprised that".
Any correct sentence (e.g., I was surprised that the pyramids were so big.)
The explorers were disappointed that they don't found any gold.
...that they didn't find any gold.