b. since
Answer: a. for
9. Lisa and Jill have been at the library _____ a long time.
a. for
b. since
Answer: a. for
Baca Juga: Rumus, Fungsi, dan Struktur Present Perfect Tense dalam Kalimat
10. My teacher has been sick _____ last Monday.
a. for
| Penulis | : | Aldita Prafitasari |
| Editor | : | Aisha Amira |
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