Đặt câu hỏi cho từ được in đậm:
1) Tom has been here $\text{for three days}$.
2) It took John $\text{five hours}$ to make the report.
3) I first met my wife $\text{while I was studying in England}$.
4) There are $\text{more than fifty}$ employees in this office.
5) It's $sunny$ today.