Answer :
1. The correct answer to complete the first sentence is:
D. either of
2. The correct answer to complete the second sentence is:
A. playing
3. The correct answer to complete the third sentence is:
B. were seen
4. The correct answer to complete the fourth sentence is:
B. must not
5. The correct answer to complete the fifth sentence is:
A. are boiling
Explanation:
1. In the first sentence, the correct completion should indicate that both basketball and soccer do not require a racquet. Therefore, the term "either of" is the suitable choice as it means one or the other, but not both.
2. In the second sentence, the verb "enjoys" should be followed by a gerund (the -ing form of a verb), which in this case is "playing."
3. For the third sentence, since it refers to the past and the subject is plural (The Olympic Games), the correct form of the verb is "were seen."
4. In the fourth sentence, the phrase "Everywhere in the world, stealing is against the law" implies that people are obligated not to steal, making "must not" the correct choice.
5. In the fifth sentence, the use of "are boiling" is appropriate as it indicates the current ongoing action of the potatoes boiling on the stove.