However, he was color blind, so he had to rely on the eyes of his assistant, who could easily (430)________all the seven colors: red, orange, yellow, green, blue, indigo and violet.

We can infer from the passage that

The word “them” means

Secondary rainbows are unusual because the light is reflected twice within the raindrop before it (431)________ a rainbow, so the colors are in reverse order and not as bright as primary rainbows.

According to the passage, which of the following is learning in broad view comprised of?

The word “emaciated” in the passage mostly means

The word “prevent” in paragraph 1 is closest in meaning to

Sailors came back from these islands with

According to the passage in which country did Einstein live in 1930s?

Which of the following best explains why composting is not feasible on a large scale?

A survey by the French army in 1881 showed that among the 387 men (411) __________there were 1,333 designs.

Even for those who do want a tattoo, the process of getting one is not painless, but the final result, in their eyes, is (413) __________ the pain.

Getting married, raising children, and finding and keeping a job are mentioned in paragraph 2 as examples of ______.