A bridge made of stone lasts longer than _____ made of wood.
| A．it | B．one | C．this | D．that |
_______ 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 |
“Why was a special meeting called?” “______ a new chairman.”
| A．Choose | B．Choosing | C．To choose | D．Chosen |