When ______ how old he was, he kept silent.
| A．asking | B．asked | C．to be asked | D．ask |
- These apples look very beautiful.
- They ________. See the price $ 3.99 a pound. Very expensive, aren’t they?
| A．should | B．would | C．could | D．might |
- Have you known each other for long?
- Not really. ________ we started to work in this school.
| A．Just after | B．Just when | C．Ever since | D．Just before |
________ with some research materials, he decided on three possible approaches in his experiment.
| A．Preparing | B．Prepared | C．Having prepared | D．Prepare |
- Remember the first time we ________, Ed ?
- Of course, I do. You ________ a song on the stage.
| A．have met; sang | B．met; were singing |
| C．met; sang | D．have met; have sung |
Our bodies are ________ by working out. Similarly, our minds are developed by learning.
| A．burdened | B．resembled | C．strengthened | D．worsened |