shall be submitted vs. shall be submitting

[Shallys]

English Grammar Tests, Elementary Level

ESL/EFL Test #188 "Verb Tense Practice (5)", question 1

I will ......... you a postcard as soon as I get there.

(a) sent
(b) sending
(c) send
(d) sends

English Grammar Tests, Elementary Level

ESL/EFL Test #188 "Verb Tense Practice (5)", answer 1

I will send you a postcard as soon as I get there.

Correct answer: (c) send
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what is difference between shall be submitting & shall be submittrd

[Beeesneees]

Only "shall be submitting" is correct (future tense)

'Have submitted' - past tense
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Cheers m' dears!