Which of the sentences are punctuated correct and incorrect?

Question

Your dreams can come true, let the caring professionals; at America's National Christian Academy work with you in achieving your dreams.

My mothers skin is as smooth as a child's.

"At last," he said the old lady "I can say I am truly happy."

Adolesence is a trying period, but it is also an exciting one!

The employer has a postion to be filled, because he can't do the job.

Answer 1

1.   Incorrect.

2.   Incorrect

3.   Incorrect

4.   Correct

5.   Incorrect

Answer 2

Only the next to last sentence is punctuated correctly.

1st sentence - run-on between true and let, semicolon should be removed.

2nd sentence - mothers needs an apostrophe.

3rd sentence - missing "to" between said and the, so the sentence doesn't make sense.

5th sentence - no comma before a dependent clause (starting with because) at the end of a sentence.

Answer 3

the fourth one is the only correct punctuation.

Answer 4

the 1st, 3rd, and last sentences are not correct

Answer 5

4th one os correct and the other 4 are incorrect

If you put an apostrophe on mother's in sentence 2 then it would be correct

Answer 6

the one that starts with "adolescence" is the only correctly punctuated sentence.