Jane.................. working at a sport shop for six weeks. Ann and I ................... good friends.

1. Jane has been working at a sport shop for six weeks.

Explanation: This sentence is in the present perfect continuous tense. We use this tense to talk about an action that started in the past and is still continuing in the present or has recently stopped. The phrase "for six weeks" indicates the duration of time, which further emphasizes that Jane started working at the sport shop six weeks ago and is still doing so.

2. Ann and I are good friends.

Explanation: This sentence is in the simple present tense. When we state facts or describe general situations that are always true, we use the simple present. The phrase "good friends" describes the current relationship between Ann and the speaker, indicating that it is a permanent state or regular condition. There's no need to emphasize duration or continuity here, as friendship often reflects a stable relationship.