Skip to main content
Home
Exams
Use of English Practice
Reading Practice
Writing Practice
Listening Practice
Speaking Practice
Speed Games
Vocabulary
Grammar
Progress
Blog
Study Essentials
Glossary
About
Contact
Privacy Policy
Terms of Use
Cookie Policy
B1 Grammar
Present perfect with for and since
1/10
Choose the correct answer.
They have known each other ___ three years.
at
since
for
in
Check answer