Mark the letter A, B, C, or D on your answer sheer to indicate the underlined part that needs correction in each of the following questions.

The result of the studies have had a strong impact on future developments.

We are raising funds for people with visual _________ in the city.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

The situation of COVID-19 worldwide is still serious, ____________?

How many children said they had some negative experience when playing sports?

By the time Ryan finally graduated from high school, he ________ five different schools because his parents moved frequently.

He was very surprised to be addressed by the Queen. He didn't answer at once.

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

He was very tired. He agreed to help me with my homework.

I spoke to a boy _________ father is a famous scientist.