Homework of today is little difficult.

Hi [이름]!

It\'s a cold Thursday afternoon!

How is the weather in Korea today?

I am so happy because you got a perfect score! Congratulations!

For item number 6, the sentence means,  any time that we are needed.

Keep up the good work! See you in class!

Teacher Nina

Prepositions of Time:
on
> days of the week
in
> months / seasons
> time of day
> year
> after a certain period of time (when?)
at
> for night
> for weekend
> a certain point of time (when?)
since
> from a certain point of time (past till now)
for
> over a certain period of time (past till now)
ago
> a certain time in the past
before
> earlier than a certain point of time
to
> telling the time
past
> telling the time
till/until
> in the sense of how long something is going to last
by
> in the sense of at the latest
> up to a certain time

Prepositions- place (position and direction):

in
> room, building, street, town, country
> book, paper etc.
> car, taxi
> picture, world
at
> meaning next to, by an object
> for table
> for events
> place where you are to do something typical (watch a film, study, work)
on
> attached
> for a place with a river
> being on a surface
> for a certain side (left, right)
> for a floor in a house
> for public transport
> for television, radio
by, next to, beside
> left or right of somebody or something
under
> on the ground, lower than (or covered by) something else
below
> lower than something else but above ground
over
> covered by something else
> meaning more than
> getting to the other side (also across)
> overcoming an obstacle
above
> higher than something else, but not directly over it
across
> getting to the other side (also over)
> getting to the other side
through
> something with limits on top, bottom and the sides
to
> movement to person or building
> movement to a place or country
> for bed
into
> enter a room / a building
towards
> movement in the direction of something (but not directly to it)
onto
> movement to the top of something
from
> in the sense of where from

Other important preposition:
from
> who gave it
of
> who/what does it belong to
> what does it show
by
> who made it
on
> walking or riding on horseback
> entering a public transport vehicle
in
> entering a car  / Taxi
off
> leaving a public transport vehicle
out of
> leaving a car  / Taxi
by
> rise or fall of something
> travelling (other than walking or horseriding)
about
> for topics, meaning what about

1 It\'s __ time you told him the truth!
about

>> Correct!
2. The soccer player was ejected because he had done something that was ___ the rules.
against

>> Correct! 
3. Another way of saying \'old-fashioned\' is \'__ the times\'.
behind

>> Correct! 
4. You shouldn\'t pick ___ him just because he\'s different.
on

>> Correct! 
5. The animal hospital? It\'s somewhere ___ that big blue building.
around
>> Correct! 
6. Being a nurse is hard work, especially if you\'re ________ call all the time.
on
>> Correct! 
7. She\'s the kind of girl who knows everything ________ everyone.
about

>> Correct! 
8. She is, ___ a doubt, the best student in the class.
without

>> Correct! 
9. __ our visit to Japan, we saw a lot of interesting places.
During

>> Correct! 
10. __ the year, I\'ve spoken to her five times.
Throughout

>> Correct! 

Wow 

>> Correct! 

>> Better: Wow!
The home work of today is difficult for me to choice right answer.

>> Today\'s homework was difficult for me.

>> OR: It was difficult for me to choose the right answer.
teacher please give me answer with explanation.

>> Teacher, please give me the explanation of the answer in class.
I think number 6 is very difficult.

>> Correct!
See you this evening~ bye

>> See you tonight. Bye.