It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.
| A．what | B．that | C．how | D．whether |
In that school, English is compulsory for all students, but French and Russian are __________
| A．special |
| B．regional |
| C．optional |
| D．original |
The doctor __________ that the little boy should often be taken out for fun.
| A．recommended |
| B．desired |
| C．spoken |
| D．adopted |
When I graduate from this famous university, I'll __________ what I have learned to everyday life.
| A．use |
| B．apply |
| C．adjust |
| D．stick |
—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 |