I bought three books, but none of _______ is interesting.
| A．which | B．that | C．what | D．them |
----______was it ______ they discovered the entrance to the underground palace?
----Totally by chance.
| A．How, that | B．What, that | C．When, when | D．Where, that |
On the chairs , who had come to Dalian looking for jobs.
| A．three young men sat | B．sat three young men |
| C．did three young men sit | D．three young men sitting |
——Did you know any French before you arrived in Washington?
——Never ____ it, actually.
| A．had I learned | B．have I learned |
| C．I have learned | D．I had learned |
_______ such a good chance, he planned to learn more.
| A．Given | B．Being given | C．Having given | D．Giving |
by a greater demand for vegetables,farmers have built more green houses.
| A． | Driven | B． | Being driven |
| C． | To drive | D． | Having driven |