解析：选A　观点态度题。根据倒数第二段"But these predictions are just predictions ...what our future family members will look like."可知，作者对于这种理论持中立的态度。

　　Ⅲ.任务型阅读

　　When you feel disappointed, you should know it is natural and normal, and everyone will experience it to some extent in their life. Sometimes life deals us a difficult hand, and events and trials arise that we have no control over. Other times it is our own actions themselves that cause our trials. Regardless of the nature of our trials, disappointment is part of life's journey and how we deal with it will largely determine the quality of our life. Here are some steps to help us to make our journey more enjoyable.

　　Firstly, redefine our rules. It is assumed that everyone has an internal "rule" in their mind. If our internal rules are too perfect, then they will discourage us greatly. For example, if we have a rule that says we need to be perfect, it is likely that we will spend a large amount of time feeling sad and disappointed. So when we feel disappointed, it is wise to review and redefine our rules. Want an example of an encouraging rule? Try this one: I am happy and I am successful since I have made my greatest efforts.

　　Secondly, remind ourselves now and then of the reasons why we are seeking the very goal. As a matter of fact, there are many cases where we have forgotten our original purposes along the way. So it is of great help to remember the reasons why we are committed to a path in the first place when we feel down. By revisiting those reasons, we will likely renew our commitment and not get hung up on the disappointment of the moment.

　　Thirdly, think about our larger vision and recommit to it. Disappointment is merely a setback on what will eventually be a great and inspiring journey. So when we have those momentary setbacks, it is helpful to think about our larger vision and recommit to it. In our larger vision, therefore, a disappointment is a very valuable experience, which serves as a good educator and makes us more able to meet the challenges of the future.

　　Finally, reset and have a new start. Resetting and starting anew prevents us from abandoning ourselves to self­pity and forces us to get up and move forward. Don't live in the past. Take what the past has taught us and keep moving. Wake up the very next day as if our whole life is ahead of us and we have the chance to start fresh. Nothing that happened in the past can stop us from creating the life that we have always desired or from accomplishing the goals that we are seeking.

Title Learning to deal with disappointment Introduction Disappointment exists (1)________and normally in our life and learning to deal with it is part of a fulfilling life. Causes of disappointment Events and trials in life are sometimes beyond our (2)________．

Our trials are sometimes (3)________by our own actions.