A quarter of my classmates...
-
The majority of people my age...
-
First of all / In conclusion, welcome to the seminar.
First of all
Most people in Mexico love / loves tacos.
Both are correct
Passived: People have used slang a lot more.
Slang has been used a lot more.
A presentation was given / was being given in class by the teacher.
was being given
Passive voice: Not long ago I was told that...
-
When he introduced / was introduced by the vice president of the company, she got his name wrong.
introduced
The majority of students try / tries to learn a new language in college.
try
Every message I receive usually...
-
Languages should only be used...
-
The group is so similar next / yet so different.
yet
Languages should be taught...
-
Use your ideas: __________ when he/she turned the radio up too loud on the car.
-
Some of the language older people use...
-
Every one of my teachers...
-
People have told me that I have good presentation sills.
I've been told that I have good presentation skills.
The scientist gives the presentation in front of a big crowd.
The presentation is given in front of a big crowd.
The students in my class learn / learns a lot in class.
learn