As we all know．____life is hard for any of us. If we live___ happy life，we must all work harder.
| A．／：／ | B．／；a | C．a；／ | D．a；a |
He was reading his book, completely _______ to the world.
| A．lost | B．losing |
| C．to lose | D．to have lost |
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 |
“Where is David?” “He is upstairs ______ ready to go out.”
| A．to get | B．getting |
| C．to be getting | D．having got |
To test eggs, _______ them in a bowl of water: if they float they’re bad, if they sink they’re good.
| A．put | B．putting |
| C．to put | D．to be putting |
She looks forward every spring to _______ the flower-lined garden.
| A．visit | B．paying a visit |
| C．walk in | D．walking in |