Opinion Essay Sentences - right or wrong??

There ____ many people in my family.

• is

• are

• to be

• can

I have many ______ for my opinion.

• reason

• reasons

We ___ to help people.

• have

• has

• must

• can

Many students like to ____ at home.

• studying

• studies

• study

• studied

We can learn more about other people and understand ___.

• they

• their

• them

• theirs

___ means I can learn more about people.

• That's

• That

• This is

• That to

There are many _____ of having a pet.

• benefit

• benefitting

• benefits

• benefitted

Travelling with your family ____ money.

• save

• saving

• saves

• is save

I feel ____ with my friends.

• more comfortable

• comfortable more

• too much comfortable

• comfortabler

Some people don't like ___ sports.

• play

• plays

• playing

• played