—Could you ride a bike when you were 5 years old?
—_____
| A．Yes, I could. | B．Yes, I couldn’t. |
| C．Yes, I can. | D．No, I can’t. |
—Dad, do I need to bring a raincoat with me ?
—I’m afraid you .
| A．will have to | B．needn’t | C．Sure, I’d love | D．No, thanks |
—Did you see him yesterday?
—No, when I got to the airport, he a taxi for home.
| A．has taken | B．had taken | C．will take | D．would take |
The old scientist devoted most of his time ___________ the space science.
| A．develop | B．to developing | C．to develop | D．developing |
_________good advice! It’s so helpful to us.
| A．How | B．How a | C．What | D．What a |
—Mary was heard_______ just now. What happened?
—John was telling a joke.
| A．cry | B．to cry | C．laugh | D．to laugh |