The air holds the feather back more than it ___ the stone.
| A．holds | B．do | C．has | D．does |
It's no use______ with him. You might as well ______ with a stone wall.
| A．arguing, argue | B．to argue, arguing | C．arguing, arguing | D．to argue, argue |
I couldn't understand ______ at the poor child.
| A．you to laugh | B．you laugh | C．why laugh | D．you laughing |
We can't understand ______ a decision until it is too late.
| A．him to postpone to make | B．his postponing to make |
| C．him to postpone making | D．his postponing making |
Alien said that his trip was _______.
| A．interested | B．interest | C．interesting | D．of interest |
---- What do you think about English? ---- It's a difficult language _____.
| A．speaking | B．to be spoken | C．to speak | D．spoken |