Sure! Here are the answers to the questions based on the text:

1. **Parents can give great help to their children's language development by...**
**Answer:** D. responding to them.

2. **What does the word "they" in the second paragraph refer to?**
**Answer:** C. questions.

3. **During the training session, experimental parents were taught to...**
**Answer:** C. ask open-ended questions.

4. **What difference between the control group and the experimental one in the study was the result of the study?**
**Answer:** A. age of the children.

5. **What conclusion can be drawn from this passage?**
**Answer:** B. The more children engage, the more intelligent they become.

6. **The "more children respond, the more they learn" idea is connected to...**
**Answer:** D. how to talk to them.

7. **Complete the sentence "This study aims to examine the effects of interactive reading strategies on language acquisition" should be finished with:**
**Answer:** C. how children respond.

If you need any more help or information, feel free to ask!