Why have there been few opportunities to study the arctic wolf? a. there is little interest in learning about the animal because they are not endangered. b. arctic wolves are difficult to locate. c. the natural habitat of the arctic wolf is inhospitable and dangerous, making it difficult for scientists to study the species. d. arctic wolves do not really exist.

1 ‘When is your Christmas / New Year's Eve / birthday?' ‘On June 3rd.'

2 Nigel's got a new mother / girlfriend / teenager. Her name is Fiona.

3 I met Robin last month and tonight we're going out on our first wedding / visit / date.

4 Was there a lot of snow last Christmas / Mother's Day / wedding?

5 Mick is getting married so he needs to meet his future parents / parents-in-law / grandparents. He's a bit nervous.

Explanation:

Completing a sentence with suitable words requires matching the context and meaning.  While some words may fit in a space, they may not be suitable in the context.  The meaning of the sentence is also important.  Some words are used in a sentence to produce some meaning.  A sentence without some meaning is completely useless.