Never______ such a difficult problem. It took me almost half an hour to work it out.
| A．had I come across | B．I had come across |
| C．did I come across | D．I did come across |
Experienced as she is, the teacher is still thinking of new ideas about how the new textbooks should be ______ .
| A．conducted | B．made | C．sent | D．carried |
It was more than he could bear when his old friend ______ him to accept a cigarette.
| A．invited | B．urged | C．persuaded | D．agreed |
In the questionnaire, the subjects are questioned whether they______ banning cars in the city center.
| A．agree | B．comment | C．advocate | D．conduct |
The explorer traveled to several remote villages, _____a lot of unusual information.
| A．gathering | B．having gather | C．to gather | D．gathered |
All the candidates were ______ the street to be named after a great man ______ his great contributions to the city.
| A．in favor of; in need of | B．in praise of; in favor of |
| C．in praise of; in need of | D．in favor of; in honor of |