Let's review today's expression

[Sweetpumpkin]

Hello,

When a teacher wants to review what she taught to the student that day, can she say this way?: "Let's review today's expressions!"

I'm curious that the definite article 'the' should be put between 'review' and 'today's.

And... how about these expressions?:

"Let's go over today's expressions/lesson!"
If she wants to review the last lesson,

"Let's go over our last lesson!"
"Let's review the last lesson!"

Any other expressions? If the grammar is wrong, please correct it!

Thank you in advance,
sweetpumpkin

[Mister Micawber]

.
These are correct:

"Let's review today's expressions!"
"Let's go over today's expressions/lesson!
"Let's go over our last lesson!"
"Let's review the last lesson!"
.
_________________
Native English teacher at Mister Micawber's

[Sweetpumpkin]

Thank you, MM. May I ask one more question?

When the boarding time is announced in the airport, what the announcer said:
1) Boarding time is~
2) The boarding time is~

I'm like an article freak, but I have to know. (It's related to my job.)

Thank you in advance,
sweetpumpkin

Oh, by the way, my alias-sweetpumpkin with small s-became Sweetpumpkin with the capital S. :o

[Mister Micawber]

.
The conductor is liable to say either. The use of the article is unimportant here.
.
_________________
Native English teacher at Mister Micawber's