根据所给汉语完成下列句子，每空词数不限。

1. 奥比斯医生所需要的是足够的钱，以继续他们的志愿者工作。  

    All ORBIS doctors need is enough money to _____their voluntary work.

2. 丹尼尔过去常常在两餐之间吃零食，但是现在不再吃了。  

    Daniel _____ eat a lot of snacks between meals, but now he doesn’t eat any more.

3. 南希酷爱打排球，她想加入排球俱乐部。  

    Nancy _____playing volleyball. She wants to join the Volleyball Club.

4. 我们已经好多年没有见面了，但是我们不时地通邮件。  

    We haven’t seen each other for many years, but we send emails _____.

5. 你的建议对我很有价值，值得采纳。  

    Your advice is _____ to me. It is worth taking.