Before class, you should look over your notes from the last(9)lecture and take a minute to speculate about what your instructor is going to talk about today.

(9)
a) No change
b) lecture, and
c) lecture; and

I think it need a comma after lecture
is that correct? thanks

No, you don't need a comma there. It's not a compound sentence (there is no separate subject for the verb "take"), so no comma is needed.

oh, thanks!

To determine whether a comma is required after the word "lecture" in the given sentence, we need to consider the use of punctuation and grammar rules.

In this case, the sentence is suggesting that before class, you should review your notes from the last lecture and then take a minute to speculate about what your instructor will discuss today.

Looking at the three options given:
a) No change: This option maintains the original sentence as it is, without any punctuation changes.
b) lecture, and: This option adds a comma after "lecture."
c) lecture; and: This option replaces the comma with a semicolon.

To determine the correct choice, we need to consider the relationship between the words "lecture" and "and." In this context, "and" is used as a coordinating conjunction to connect two independent clauses. To show this relationship, a comma before "and" is typically enough.

Therefore, option b) "lecture, and" is correct, as it properly incorporates a comma where it is needed.