The concrete bags have likely become hard and are no longer usable. When concrete bags are exposed to moisture, they can harden and become lumpy, making it difficult to mix and pour. It is important to store concrete bags in a dry and cool place to maintain their usability. If the bags have hardened, it is best to dispose of them properly and purchase new bags for your project. **

If you accidentally oiled untreated parquet flooring with hard oil, you can try to remove the oil by using a solvent or a commercial oil remover specifically designed for wood floors. It's important to act quickly before the oil penetrates too deeply into the wood. You may also need to sand the affected area to remove the oil and then refinish the flooring with the appropriate treatment for untreated parquet. It's best to consult with a professional flooring specialist for the most effective and safe solution. **

While it is possible to play beach volleyball on a hard surface like concrete or asphalt, it is not recommended. Beach volleyball is traditionally played on sand, which provides a softer surface for players to dive and move around comfortably. Playing on a hard surface can increase the risk of injuries due to the impact on players' joints and bodies. Additionally, the game dynamics and strategy may be different on a hard surface compared to sand. **

The costs for sanding and sealing parquet flooring can vary depending on the size of the area, the condition of the flooring, and the location. On average, the cost can range from $3 to $5 per square foot. This cost typically includes sanding down the old finish, repairing any damage, applying a new finish, and sealing the flooring to protect it. It is recommended to get quotes from multiple contractors to compare prices and services before making a decision. **

Breasts can feel firm or soft depending on various factors such as hormonal changes, menstrual cycle, pregnancy, breastfeeding, or certain medical conditions. Breasts may feel firmer and more tender during certain times, such as during the menstrual cycle or pregnancy, due to hormonal changes and increased blood flow. However, if breasts feel unusually hard or lumpy, it is important to consult a healthcare professional to rule out any underlying issues. **

Yes, cockroaches are hardy insects. They are able to survive in a wide range of environments and can go without food for long periods of time. They are also resistant to many insecticides and can adapt to changing conditions. These traits make them difficult to control and eradicate. **

It's difficult to say without more context. If you're referring to a past affair, it could resurface if there are unresolved issues or if one or both parties are still struggling with the aftermath. If you're referring to a current affair, it could resurface if there are ongoing challenges or if the individuals involved are finding it difficult to keep the affair hidden. In either case, it's important to address the underlying issues and seek support to navigate the situation. **

Hard bread and hard rolls can be repurposed in a variety of ways rather than being thrown away. They can be turned into breadcrumbs by simply grating or processing them in a food processor. These breadcrumbs can then be used as a coating for fried foods, as a topping for casseroles, or as a filler for meatballs or meatloaf. Additionally, hard bread and rolls can be soaked in liquid (such as milk or eggs) to make dishes like bread pudding or French toast. **