Do you know how pumpkins got _______ with Halloween?
| A．associated | B．to associate |
| C．associating | D．associate |
They usually have the medicine_______ before putting into the market all over the country.
| A．testing out | B．to be tested out |
| C．being tested out | D．tested out |
---Where is your new home now?
---In the new developed zone. But I _____ downtown for five years.
| A．have lived | B．had lived |
| C．lived | D．was living |
—Hi, Mr．Brown! May I pick a flower in the park?
—_______.
| A．No, you don’t | B．No, you mustn’t |
| C．No, go ahead | D．Yes, you could |
This problem is said _______ three times, but he still can’t understand it.
| A．to have been explaining | B．to have explained |
| C．having been explained | D．to have been explained |
---I heard that you made a bicycle trip to the 2010 World Expo of Shanghai alone.
---No. Actually, my friend Bob ________ me.
| A．accompanied | B．conducted |
| C．instructed | D．received |