Fill in: breathe, observing, repeat, separate, struggle.
1. For this study, the psychologist will
the girls from the boys.
2. Although I in physics, I do very well
in chemistry.
3. The air we
is actually 78% nitrogen
and only 21% oxygen.
4. Scientists have to their experiments
again and again to make sure the results are
valid.
5. Biologists have to be patient while they're
animals in the wild.

sashakoritnij    1   10.09.2020 20:21    58