QUES: This surface lining comes in two variants

correct the punctuation.

CORRECTED: This surface lining comes in two variants:
Question: As an example high concentrations may occur in small almost dry ditches just after spraying but this case may not represent the situation wanted as a basis for the administrative decision
--
Answer: As an example, high concentrations may occur in small, almost dry ditches just after spraying, but this case may not represent the situation wanted as a basis for the administrative decision.
In contrast the WCu microstructure manufactured by traditional infiltration technology is characterized by copper pools and very large tungsten grains which results in machined parts that exhibit a larger number of grain pullouts and pits

Can you repeat this sentence, but add in punctuation?
In contrast, the WCu microstructure manufactured by traditional infiltration technology is characterized by copper pools and very large tungsten grains, which results in machined parts that exhibit a larger number of grain pullouts and pits.
input: Read more about our teachersHERE
fixed: Read more about our teachersHERE.
input ---- The snow quickly improves and I feel confident enough to continue
output ---- The snow quickly improves and I feel confident enough to continue.
Add punctuation: During the autumn of 1996 and the spring of 1997 test runs and deliveries were carried out and now deliveries have begun in earnest at first in Scandinavia and then gradually throughout western Europe
A:
During the autumn of 1996 and the spring of 1997 test runs and deliveries were carried out, and now deliveries have begun in earnest, at first in Scandinavia and then gradually throughout western Europe.