Раскройте скобки, употребляя глаголы в past simple или в past continuous.
9. kate (read) a book when the light (go down)
10. we (watch) a film when our friends (call) ​

9. was reading , went down

10. were watching , called

9. Kate was reading a book when the light went down.
Explanation: The action of Kate reading a book started in the past and continued for some time. At that moment, the light suddenly went down.

10. We were watching a film when our friends called.
Explanation: The action of us watching a film started in the past and continued for some time. During that time, our friends called us.

Step-by-step solution:
For the first sentence, we need to use the past continuous for "read" and the past simple for "go down".

1. Identify the main action and the action happening at the same time:
- Main action: Kate reading a book
- Action happening at the same time: the light going down

2. Put the main action in the past continuous:
- Kate was reading a book

3. Put the action happening at the same time in the past simple:
- the light went down

For the second sentence, we need to use the past continuous for "watch" and the past simple for "call".

1. Identify the main action and the action happening at the same time:
- Main action: we watching a film
- Action happening at the same time: our friends calling

2. Put the main action in the past continuous:
- We were watching a film

3. Put the action happening at the same time in the past simple:
- our friends called