I afraid of the dark, but now I don’t.
| A．use to | B．used to | C．use to be | D．used to be |
The missing boy was last seen ___ near the river.
| A．playing | B．to be playing |
| C．play | D．to play |
They knew her very well. They had seen her ___ up from childhood.
| A．grow | B．grew |
| C．was growing | D．to grow |
---I'm sorry to keep you waiting.
---Oh, not at all. I ___ here only a few minutes.
| A．have been | B．had been |
| C．was | D．will be |
You don't need to describe her. I ___ her several times.
| A．had met | B．have met |
| C．met | D．meet |
—_______ does it take to walk from your home to your school?
— Fifteen minutes.
| A．How far | B．How long |
| C．How often | D．How much |