The two brothers look so much alike that it is difficult to ______.
| A．tell them from | B．tell from them |
| C．tell apart them | D．tell them apart |
A cook will be immediately fired if he is found _______ in the kitchen.
| A．smoke | B．smoking | C．to smoke | D．smoked |
We looked everywhere for the keys, but they are nowhere _______.
| A．to find | B．to have found | C．to be found | D．being found |
He was reading his book, completely _______ to the world.
| A．lost | B．losing | C．to lose | D．to have lost |
Anyone _______ bags, boxes, or whatever, was stopped by the police.
| A．seen carry | B．seen carrying | C．saw to carry | D．saw carrying |
“Mum, why do you always make me eat an egg every day?” “________ enough protein and nutrition as you are growing up.”
| A．Get | B．Getting | C．To get | D．to be getting |