The young couple, who returned my lost wallet, left _______ I could ask for their names.
| A．while | B．before | C．after | D．since |
The film star walked to his car, ______ a crowd of journalists.
| A．followed by | B．following by |
| C．to follow | D．to be followed by |
_______ on time, this medicine will be quite effective.
| A．Taking | B．Being taken |
| C．Taken | D．Having taken |
When I handed the report to John, he said that George was the person _______.
| A．to send | B．for sending it |
| C．to send it to | D．for sending it to |
He is a man of few words, and seldom speaks until _______ to.
| A．spoken | B．speaking |
| C．speak | D．be spoken |
Though I have often heard this song _______. I have never heard you _______ it.
| A．being sung, sang | B．sang, singing |
| C．sung, sing | D．to be sung, to sing |