This is a personal question. I will answer below according to the word that was unfamiliar to me, but feel free to add to the answer in case there were more for you.
Answer and Explanation:
The word that I found unfamiliar and whose meaning I did not know at first was "behest". I had never seen that word before. To understand its meaning, I looked for context clues. <u>The rest of the sentence in which "behest" appears functions as a clue to finding its meaning. It says that, at a person's behest, something happened: "the Exhibition dropped its superfluous rags and stripped itself. . ." As soon as I read this part, it made me think of the word "command." For instance, the sentence "At the general's command, the troops advanced" has a similar connotation to the one with "behest".</u>
To confirm my assumptions, I looked the word up online and found it indeed means "order" or "command".
A primary source is where the information comes directly from the original copy or someone who experienced it first hand, and where as a secondary source is someone or something that was not there when the event took place- hope this helps!!
The statement that was correctly written is this: Rajeev practices harder than anyone else in the orchestral.
Looking carefully at all the sentence given above, it can be seen that it is only the sentence in option A that obeys all the needed grammatical laws. The other three sentences are not grammatically correct. The correct sentences for the other options are listed below:
B. No one can be as impatient as my younger brother.
C. My friend, Sam draws better than anyone else in our art class.
D. His poem was shorter than all the other poems.
