Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[EX Q]: Norplant implants are ____ matchstick size rods that are inserted into the upper arm.
[EX A]: six

[EX Q]: Maps are ____ dimensional representations of the earth's surface.
[EX A]: two

[EX Q]: Nerves run to and from centres, giving ____ impressions until their termini are reached.
[EX A]:
no