<p>Some people believe that one day we will establish not only bases on the Moon, but also a landing on Neptune will occur.
I was stuck between B and E. so could someone explain why is B the answer, doesn't E have parallelism with the "we will" part? Is it because "not only" is always followed by "but also"?</p>
<p>B- not only bases on the Moon will be established, but also a landing on Neptune will be made.</p>
<p>E- we will not only establish bases on the Moon, but we will land on Neptune</p>