They are considering______ they should do the experiment .
| A．weather | B．that | C．whether | D．what |
—I heard you went to Hainan the other day.
—So I did. That was the third time that I __________ there.
| A．was |
| B．am |
| C．had been |
| D．have been |
A notice was placed by the river bank warning people to__________ the thin ice.
| A．keep up |
| B．keep back |
| C．keep away |
| D．keep off |
The place _______interested me most was the children's palace.
| A．which |
| B．where |
| C．what |
| D．in which |
On receiving a phone call from his wife __________ she had a fall, Mr. Gordon immediately rushed home from office.
| A．says |
| B．said |
| C．saying |
| D．to say |
The days are gone __________ physical strength was all you needed to make a living.
【选项 】
| A．when |
| B．that |
| C．where |
| D．which |