Once the Hubble ______

[Volcano1985]

Once the Hubble _______ on end on a platform in the cargo bay, ground control ______ the telescope's solar panels to roll up

A) will be standing / controls
B) has been standing / will be controlling
C) had been standing / was controlling
D) is standing / will control
E) had raged / battled / is trailed

What do you think?

[SoothingDave]

I'd eliminate "E" for sure.

[BobK]

After you, Volcano1985! (What do you think? - We try to teach here, unlike some websites that just do your work for you. )

b

[Volcano1985]

I think B or D

[bhaisahab]

Only D is possible.

[5jj]

I'd eliminate "E" for sure.

Party pooper!

[BobK]

I think SD's elimination was pedagogically OK, because E is so obviously irrelevant - in fact, impossible (as it offers three possible fillers for two slots).

b