Final answer:
This answer provides the appropriate tense for the verbs given in the sentences.
Step-by-step explanation:
1) In 1998, John visited Tahiti with a group of friends.
2) This month Tom is having a sandwich.
3) Julie is at the cinema waiting for Tom. She knows him since she was six years old.
4) Marie only has half an hour for lunch so she usually goes to the hairdresser's to have her hair cut.
5) David is a good friend of mine. I am revising for his exams.
6) At the moment I need to concentrate. I have written 4 pages already.
7) Tom is writing an important report. He does a grammar exercise.
8) Once a month Caroline travels all over Australia.
9) Last year Peter took Caroline to the theatre.
10) Next Saturday, Peter will be waiting for 10 minutes.
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