B4

A lot of people don't believe in yellow-spotted lizards either but if one bites you, it doesn't make a difference whether you believe in it or not.
(1.present simple, т.к. это общее утверждение. 2. present simple, т.к. это общее утверждение)

 BITE

 BELIEVE

B5

Actually, it is kind of odd that scientists named the lizard after its yellow spots.Each lizard has exactly eleven yellow spots but the spots are hard to see on its yellow-green body.
(present simple,т.к. это общее утверждение)

 HAVE

B6

The lizard is from six to ten inches long and has big red eyes.
(1. 2. present simple,т.к. это общее утверждение)

BE

 HAVE

B7

In truth, its eyes are yellow, and it is skin around the eyes which is red, but everyone always speaks of its red eyes. It also has black teeth and a milky white tongue.
(1. 2.present simple,т.к. это просто описание ящерицы)

 BE

 SPEAK

B8

If you have ever been close enough to see the yellow spots, you are probably dead. (Louis Sachar "Holes")
(present perfect, т.к. говорится о периоде. Есть слово “ever – когда либо”. Это как в предложениях “Have you ever seen me? Have you ever been to Thailand?" Если вы когда-либо были достаточно близко, чтобы увидеть жёлтые пятна, вы, вероятно, мертвы)

BE