This is most certainly a fact about lotr
After the scientist studied the samples, he placed them back in their container.
You may think that the movie is too long, but I find it just the right length.
If Jenna can't find a ride to the show, she will have to take the bus.
When students ask questions in class, the teacher answered them clearly.
when students ask<ask is present tense>questions in class, the teacher answered<answered is past tense, to be corrected, it should be (answers)>them clearly.
A.
past
B.
past perfect
C.
present
D.
future
The correct answer is A, past.
The verb taught is a past tense verb or a past participle. This automatically excludes C, present and D, future.
The choice is now between A and B. To form a past perfect you need the verb "to have" in the past, "had". Because there isn't an auxiliary verb here, it is in the past. It also helps to look at the word "yesterday", which shows us this is a past action but not that far in the past to be called a "past perfect".
The correct answer is A. Past
I took the quiz :)