When to use or omit “that”

In many sentences, the subordinating conjunction or relative pronoun "that" can be omitted. But it's not always easy knowing when you need to use "that" and when you can leave it out. In the sentences below, decide whether to use or to omit this tricky little word.

1. During the fire drill, the staff found Placeholder for the answer several students were unaccounted for.
2. I'm sure Placeholder for the answer we discussed that at last week's meeting.
3. You said Placeholder for the answer I could go.
4. Claire hopes Placeholder for the answer that proposal will be turned down.
5. No one believed Danny's claim Placeholder for the answer he was framed.
6. The letter Placeholder for the answer I received from my sister mentioned her daughter's upcoming marriage.
7. One of the bystanders shouted Placeholder for the answer an ambulance was on its way.
8. The parcel Placeholder for the answer arrived today is from head office.
9. Luca promised Placeholder for the answer he would drive us to the airport and that the car would be ready by 4:30.
10. Bianca understood Placeholder for the answer, given her heavy workload, the deadline was flexible.