Select the most appropriate option to fill in the blank.

The Chinese leader's formal Chinese suit ______ Changpao.

is called

The most appropriate option to fill in the blank is:

☀ is called

Explanation for all options:

1. is called: This is the correct option. It correctly completes the sentence by indicating that the Chinese leader's formal Chinese suit is referred to as "Changpao."

2. are called: This option is incorrect because the subject "Chinese leader's formal Chinese suit" is singular, so the correct verb form should be "is called."

3. is call: This option is incorrect due to incorrect verb tense and form. The correct form is "is called."

4. will be called: This option is not appropriate because it uses future tense, which is not needed in the context of stating the name of the Chinese leader's formal suit.