He graduated as early as April.
Ha has already come.

in the fifth century
in the ninth century
6.  In the late 1940s
7. in the early 1980s
8. in the late 1980s
10. in the early 21st century = in the early 2000s

a recipe
a prescription
a remedy

a 110-year anniversary


1. dozens of cookies
two dozen cookies
two dozen silver spoons
2. hundreds of cars
five hundred cars
3. thousands  of people
seven thousand people
4. tens of thousands of lakes
sixty thousand lakes
5. millions of refugees
fourteen million refugees

a couple of days
He'll stay here for a couple of days.
for a few days = several days
"Who was Sally Ride?" = SUORA KYSYMYS
I don't know who Sally Ride was. = EPÄSUORA KYSYMYS

... whose work has had an impact on medicine.
... whose work has had an influence on medicine.
... whose has had an effect on medicine.

on purpose = tarkoituksella
deliberately

vaccinate (v.) = rokottaa
a vaccine (n.) = rokote
vaccination (n.) = rokottaminen

They are very much alike. = They are similar TO each other.
They are different to each other.