=> 1. The wheel was invented thousands of years ago. -> bị động QKĐ was/were V3/ed 2. Is a statue of Chu Van An being built? -> bị động HTTD is/am/are S being V3/ed?
People invented the wheel thousands of years ago
the wheel was invented thousands of years ago
2. Are they building a statue of Chu Văn An ?
Is a statue of Chu Van An being built