q1) most states in the united states had enacted child labor laws by 1920, ( but not until 1938 when) the fair labor standards act established a national minimum working age.
(A) but not until 1938 when
(B) but it was not until 1938 that
© not until 1938 did
(D) it was,however, not until 1938 that
(E) and not until 1938 when
Explain please :-?
not until…did
you can consider this a standard correlative conjunction/expression
Let’s break it down!
Most states in the united states had enacted child labor laws by 1920.
^ This is a complete thought. It says one specific thing: that the laws were in place BEFORE 1920.
A) but not until 1938 when
^ This directly contradicts the first part of the sentence. This answer, because it doesn’t have its own subject, must still be referring to the laws. But it doesn’t make sense that the laws weren’t enacted “until 1938”–we already said they were enacted before that.
E) has the same reasoning as A.
C) is grammatically incorrect when you put it into the sentence. Not until 1938 did established? That doesn’t work.
D) creates two independent thoughts joined by a comma. That is a comma splice, so that’s wrong. (A comma splice can be fixed by making the thoughts two separate sentences or by changing the comma to a semicolon.)
B is correct. There are two thoughts joined by a comma and a conjunction. The second thought has its own subject and both of them make sense.
thanks man 