Change, fly, jog, eat

[Cranberry]

English Grammar Tests, Elementary Level

ESL/EFL Test #208 "Related Things (2)", question 3

Change, fly, jog, ..........

(a) knob
(b) eat
(c) doll
(d) boat

English Grammar Tests, Elementary Level

ESL/EFL Test #208 "Related Things (2)", answer 3

Change, fly, jog, eat.

Correct answer: (b) eat

Your answer was: correct
_________________________

Why is "eat" correct answer? Whereas both knob and boat can also be used as verbs.

[Beeesneees]

You are mistaken. 'Knob' and 'boat' cannot be used as verbs.
_________________
"Inside every old person is a young person wondering what happened."
Terry Pratchett

[Cranberry]

Perhaps I'm mistaken as I'm not a native speaker but I do believe dictionaries. In Collins (En-En) there are following meanings of 'boat' and 'knob':
'boat'
vb
- (intr) to travel or go in a boat, esp as a form of recreation
- (tr) to transport or carry in a boat
'knob'
vb knobs, knobbing, knobbed
- (tr) to supply or ornament with knobs
- (intr) to form into a knob; bulge
- (Brit taboo) to have sexual intercourse with (someone)
Could it be possible that they aren't used but their verbal forms exist?
I can't get it clear. I'm confused. Can you help me?

[Cranberry]

Mistakenly I've sent two similar messages :-) Tried to delete the second one but failed :)
So I decided to edit it in order to say that I'm entirely crazy about this site and deeply appreciate the work of Coaches and Founders! Thank you a lot!

[Beeesneees]

I had forgotten about the occasional use of 'boat' in sentences such as
'We are going to boat down the river on Sunday afternoon'.
Obviously the test writer had forgotten about this use too.
It is much, much rarer than 'boat' as a noun.

I can't find 'knob' as a verb in Collins online and I only found 2 mentions of it as a verb in the first 1- dictionary definitions I looked at from onelook.com
_________________
"Inside every old person is a young person wondering what happened."
Terry Pratchett