В Passive: 1.What were you doing yesterday at this time? I was removing the calculus from the teeth.
2. A pathologist examines the tissues, using clinical and laboratory procedures.
3. In 1905, a German chemist discovered procaine, which he later called Novocain.
4. But this discovery definitely didn’t start the ear of dentistry, as some other dentists did t before.
5. This highly effective drill shortens the time of teeth preparation for the filling.

suhtuevaa    2   14.12.2020 11:25    1