51. Don’t put your cell (手机) _____ the edge of the table, or it will fall off
| A．at | B．on | C．to | D．In |
Can you see a man __________ there _________ at you now?
| A．sit; look | B．sat; looking | C．seated; looking | D．seated; look |
．The teacher , with 6 gilrs and 8 boys of her class ,________visiting a museum when the earthquake struck.
| A．was | B．were | C．had been | D．would be |
There is still some doubt ________ the autumn sports meet will be held in our school, but there is no doubt ________ it will be held soon after our National Day holiday.
| A．that; that | B．whether; whether | C．that; whether | D．whether; that |
________ I admit that there are problems, I don’t agree that they can’t be solved.
| A．When | B．As | C．While | D．But |
．The lion is considered the king of the forest as it is a(n) ________ of courage and power.
| A．example | B．sign | C．mark | D．symbol |