Here are the completed sentences in simple future tense:

III. Complete the sentences in simple future tense (will / won’t V), using the given verbs:

1. John **will make** himself a sandwich because he’s hungry now.
2. It’s going to rain so we **won’t go** biking in the park as planned.
3. I think she **will fail** the exam since she hasn’t prepared anything for it.
4. I believe the villagers here **will maintain** their traditional lifestyle.
5. We **will have** an English test next week, let’s do some review now.
6. I **won’t be** able to meet you tomorrow because I have to stay home and take care of my little sister.
7. I **will trust** you if you tell me the truth.
8. I’m sure that she **will return** the money for you, she is an honest woman.

IV. Write first conditional sentences (with If / Unless) using the given words:

1. If she **keeps** eating fast food, she **will put** on weight.
2. If the weather **is** bad this Saturday, we **will cancel** the camping trip.