The phrase "keeps sellers on their toes" in the passage mostly means _________.

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. 

Jack was very thirsty. He refused the glass of water I brought to him.

What you're saying ________ what you said earlier. 

The pianist whom played in the concert last night was internationally famous.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. 

Many people decided to give up eating meat and become vegetarians.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 

The number of amphibians on our planet is declining rapidly in both local mass extinction and population crashes. 

A crowd of ________ had gathered at the scene of the accident.