Sudden disasters filled the atmosphere with smoke and dust , …………… blocked out the Sun, causing the climate to become cold and dark.
whose
which
who
when
In the Antarctic, ……………….. plants and animals face a harsh cold environment,
archaeologists have found evidence that this area was once much warmer.
where
Humans, …………………………. activities cause global warming, need to take action.
. which
A film ……………………watched by my son every day.
is
were
are
was
The housework………………done by my mother last night.
wrer
- Al Zahrawi,……………….. was a surgeon, developed many medical instruments still in use today.
Several ice ages , …...........…. glaciers covered much of Earth’s surface, have taken place.
The car…………………..by the mechanic yesterday.
was fixed
fixing
fixes
fix
Geologists, ……………………… study Earth’s formation and its rocks, find out whathappened in the past by looking at layers of rock.
Global warming, ……………is a subject I’m very interested in, is the topic of the conference.
This phone,………………. I bought secondhand, is just as good as any new model.
People say the author’s latest book,……………….I haven’t read yet, is quite good.
That girl,……………….. name I’ve forgotten, goes to my school.
- What are the hot melted rocks ………………….?
. call
calling
called
calls
Around 1.5 million years ago, some of …………volcanoes in Jordan were active.
old
younger
young
the youngest