Jawaban:

Task 9 (kalau tidak salah)

1. They (came) to their class

2. My father (arrived) from Japan

3. She (practiced) playing the piano a lot

4. She (explained) the lesson

5. He (received) your letter

Task 10

1. He did not leave for Palembang

2. They did not prepare their lesson

3. Samsury did not pass the test

4. She did not learn well before the test

5. The worker did not get their pay

Task 11

Work=Worked

Start=Started

See=Saw

Tell=Told

Cut=Cut

Read=Read (tapi dibaca Red)

Watch=Watched

Paint=Painted

Send=Sent

Go=Went

sekedar info, kalau mau cari verb 2 dari kata kerja verb 1 nya bisa cari di Google dengan keyword "Verb 2 (kata kerja yang ingin di cari)" atau bisa juga biasa nya ada di bagian tengah buku kamus bahasa inggris

maaf kalau ada yang salah