1. help out

答案 1
2. get along

答案 2
3. worry about

答案 3
4. keen on

答案 4
5. as long as

答案 5

正确答案是：1. help out → to assist or aid (someone), esp. by sharing the burden or cost of something, 2. get along → have a harmonious or friendly relationship, 3. worry about → to think about problems or things that might happen and make you feel unpleasant and afraid, 4. keen on → interested, eager or wanting (to do something) very much, 5. as long as → on the condition that