Answer:
4. we timed ourselves during the experiment
The correct answer is B. Father
Before he left the house modifies father because it further explains the father's qualities, that is he is a person that's left the house.
Answer: I think the answer is C.
Explanation: If I was a employee and someone said " wouldn't you do the same if you had the chance " that would seriously get my attention. I do not know this for sure but to me sounds like the reasonable answer.
Answer: Indicative: The first president of the United states was George Washington. The indicative form is used to express simple statements.
Imperative: Pick up all of your dirty clothes off the floor right now!. Write a thank you letter to your grandmother for your birthday gift. The imperative form is used to give orders.
Conditional: If I had enough money, I would travel around the world. The conditional form is used to express a wish or a situation that depends on another.
Subjunctive: I wish rotary phones were still in use. The subjunctive is used to express a wish or a hypothetical situation.
Explanation: it's right
I think B option is the correct one that should be paraphrased in an essay i.e. A term recently introduced in the field of computer science .