This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?
| A．a | B．an | C．the | D．/ |
They went to the church________silence．
| A．for |
| B．on |
| C．in |
| D．with |
My parents________for me to have dinner when I got back home yesterday evening．
| A．wait |
| B．waited |
| C．have waited |
| D．were waiting |
They have fun________their homework all the time．
| A．do |
| B．to do |
| C．doing |
| D．to doing |
Thanks for helping me________out that problem．
| A．work |
| B．working |
| C．works |
| D．to working |
The news on TV reported that it would rain________．
| A．heavy |
| B．hardly |
| C．heavily |
| D．big |