Which of these sentences is punctuated correctly?

Although the concert doesn’t start for over an hour, most of the fans have already arrived at the concert hall.

The concert doesn’t start for over an hour; though, most of the fans have already arrived at the concert hall.

Most of the fans have already arrived at the concert hall; however, the concert doesn’t start for over an hour.

Even though the concert doesn’t start for over an hour; however, most of the fans have already arrived at the concert hall.

they insisted that there was not enough time to learn everything.  

explanation:

if they were going to steal the answers that is simply because they insisted that there was not enough time to learn everything.  

the correct answer would be d, i never like waking up.

explanation:

iambic tetrameter is a meter which is basically a line consisting of four feet of iambic and it is used in poetry. it consists of unstressed syllables followed by a stressed syllable. in this question, the only statement which is giving the feel of being stressed is option d, which says that i never like waking up. it means the person is feeling stressed whenever he wakes up. he never likes to wake up and and whenever he wakes up, he doesn't like it. so a sense or feel of being stressed is in this statement.  

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99