What is the meaning of 'test tube'?

[Lusen]

Test No. incompl/inter-59 "Testing, Testing", question 8

In the story of Dr Jekyll and Mr Hyde we see the hero mix something up in a test ......... and then drink it.

(a) tube
(b) pipe
(c) glass
(d) cup

Test No. incompl/inter-59 "Testing, Testing", answer 8

In the story of Dr Jekyll and Mr Hyde we see the hero mix something up in a test tube and then drink it.

Correct answer: (a) tube

Your answer was: incorrect
In the story of Dr Jekyll and Mr Hyde we see the hero mix something up in a test glass and then drink it.
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Why' tube'?

Lusen

[Alan]

Tube is the shape.
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[Ahmadsuffians]

Why in this sentence ..the hero mix (not mixes) and ....drink (not drinks)?
In the story of Dr Jekyll and Mr Hyde we see the hero mix something up in a test ......... and then drink it.

[Diverhank]

Lusen: Only "tube" goes with "test" in this test. A test tube is a long cylindrical glass vessel used in chemistry labs.

Ahmad: Think of this modified sentence, then "mixes" and "drinks" no longer make sense:

"In the story of Dr Jekyll and Mr Hyde we see him mix something up in a test tube and then drink it."

[Alan]

Hi ahmadsuffians,

We need the infinitive form after 'see' in this sentence or we could use the gerund form 'mixing'. The same construction can be seen in these sentences:

They watched him play/playing football.

We heard them sing/singing in the concert hall.

I saw him leave/leaving the house.

Alan
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[Ahmadsuffians]

Okay...Thanks Allan.