1. Today I m feeling incredibly exhausted. I hope to have a break tonight. 1) possess 2) possessed 3) had possessed

1) possessed. The correct answer is "possessed". In this sentence, the verb "hope" is in the present tense, so we need to use the simple past tense of the verb "possess" to agree with it correctly. Therefore, "possessed" is the correct form.

2) would not have discovered. The correct answer is "would not have discovered". This sentence is in the past tense, and the verb "supposing" indicates a hypothetical scenario in the past. Therefore, we need to use the past perfect tense to express that if Columbus hadn"t been so fond of traveling, he would not have discovered America. Hence, "would not have discovered" is the correct form.

3) arrive. The correct answer is "arrive". In this sentence, the conjunction "in case" introduces a condition in the present or future, and the main clause is in the future tense ("won"t wait"). Therefore, we need to use the base form of the verb "arrive" to express the future condition. Hence, "arrive" is the correct form.

4) were. The correct answer is "were". This sentence is a hypothetical statement in the present, known as the second conditional. We use the past subjunctive form "were" instead of "was" to express an unreal or contrary-to-fact condition. Therefore, "were" is the correct form in this sentence.

5) were. The correct answer is "were". This sentence is also a hypothetical statement, known as the second conditional, where we express an unreal or unlikely condition. In the second conditional, we use the past simple form of the verb "to be" ("were") for all subjects. Therefore, "were" is the correct form in this sentence.