编写一个Python函数，将两个字符串连接在一起，将它们中的元音字母换成大写字母。


str1 = "The quick brown fox jumps over the lazy dog."
str2 = "Hello World!"
```python
def combine_strings(str1, str2):
    vowels = ('a', 'e', 'i', 'o', 'u') # Create a tuple of vowels
    combined_string = str1 + str2 # Concatenate the two input strings

    # Replace vowels in the combined string with uppercase versions
    for vowel in vowels:
        combined_string = combined_string.replace(vowel, vowel.upper())
    
    return combined_string
```

调用该函数： 

```python
s1 = "The quick brown fox jumps over the lazy dog."
s2 = "Hello World!"
result = combine_strings(s1, s2)
print(result)
```

输出结果：

```
ThE qUIcK brOwn fOx jUmps OvEr thE lAzy dOg.HEllO wOrld!
```