C. Complete the sentences. Write "for" or "since".
(Hoàn thành các câu. Viết "for" hoặc "since")
1. I've been part of the fossil research team _________ three months.
2. Jason hasn‘t written any research articles _________ he became a professor.
3. Penny has been a member of the Science Club _________ two years.
4. The museum has had the skeleton on display ___________1998.
5. Archeologists have known about the footprints in the cave __________ six months.
6. Researchers haven't discovered any fossils in the area __________ last year.
Bài Làm:
1. I've been part of the fossil research team for three months.
2. Jason hasn‘t written any research articles since he became a professor.
3. Penny has been a member of the Science Club for two years.
4. The museum has had the skeleton on display since 1998.
5. Archeologists have known about the footprints in the cave for six months.
6. Researchers haven't discovered any fossils in the area since last year.