Choose the correct words.

1) Although / All in all, I am not in favour of experiments on animals.
2) This cure is effective. On the other hand, / To sum up, there can be side effects.
3) Its cause is unknown. Even though / What's more, I don't think scientists will ever find a cure for it.
4) The treatment always works, also / but it is expensive.
5) Zootherapy can't cure cancer. Furthermore / However, it can help people suffering from depression.

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