помогите с английским 4 класс

А

Прочитай текст. Выбери из таблицы варианты правильных ответов соответствующие указанным номерам А1-А6 так, чтобы они грамматически соответствовали содержанию текста. Обведи выбранный вариант.

Viruses (8) … (present) a special challenge to medical treatment. Traditional vaccines (9) … (consist) of either the weakened or the heat-killed virus proteins. While such vaccines (10) … (be) quite successful against some infections, they fail to cope with others. The problems in traditional immunization (11) … (sparkled) interest in new and improved vaccine models. Researches now can insert a gene from a pathogen (возбудитель инфекции) into a piece of DNA. When this (12) … (inject) into issues, a protein that (13) … (stimulate) an immune response (14) … (produce).

A. 1

a) presents

b) are present

c) is present

d) present

с

A. 2

a) is consisting

b) were consist

c) had consist

d) consist

A. 3

a) have been

b) is

c) are

d) were

ад

A. 4

a) sparkled

b) sparkles

c) sparkle

d) have sparkled

ад

A. 5

a) injected

b) injects

c) is injected

d) are injected

б

A. 6

a) stimulated

b) stimulates

c) is stimulating

d) were stimulating

с

A. 7

a) is produced

b) had produced

c) were produced

d) produced

ад