B4

Do you know what holography is? It is a technique based on lasers, which enable 3-D (three-dimensional) images to be made.
(Participle II, “основанная на”, подходит по смысловому контексту)

 BASE

B5

In 1962, Soviet physicist Yuri Denisyuk came up with the first reflection hologram also known as the “Denisyuk hologram”.
(past simple, т.к. событие произошло в определённый момент в прошлом, в 1962.)

COME

B6

Now the technology is used in most holographic displays and it was the first to allow multi-color image reproduction in holograms.
(present simple passive, т.к. технология используется, а не использует)

 USE

B7

Johnny noticed a change in his mother’s appearance. “Mommy, some of your hairs are turning / have turned grey. Why?” the curious child asked.
(present continuous, т.к. говорящий хочет сосредоточиться на процессе, становятся седыми. 
present perfect,т.к. говорящий сосредотачивается на результате, уже стали седые.)

TURN

B8

The mother tried to use this occasion to teach her child: “It is because of you, dear. Every bad action of yours shows on my hair.
(твоё действие)

 YOU

B9

It turns one my hairs grey!”
(present simple, 3-е лицо)

 TURN

B10

The child replied innocently: “Now I know why my grandmother has only grey hair on her head.” Most children are smarter than adults think.
(степень сравнения)

 SMART