The children, _____ had played the whole day long, were worn out.
| A．all of what | B．all of them |
| C．all of whom | D．all of which |
Thomas Alva Edison didn’t “invent” the light bulb, but rather he ______ a 50 –year –old idea, which is not well –known.
| A．improved upon | B．take down | C．put up | D．break away |
Badly dressed and speaking in a strange way, he must have ______ to the people present to be a silly old man.
| A．appeared | B．pretended | C．shown | D．thought |
There’s not any beer left and the bar is shut so we’ll have to _______.
| A．go out | B．go off | C．go without | D．go through |
— Would you like to go to London with us next week?
— I’d like to, but my parents ______ that I am too young.
| A．are against | B．oppose | C．object | D．explain |
We have planted many trees in order to ____wind and sand in the desert.
| A．hold down | B．hold up | C．hold back | D．hold out |