After several weeks, they ____ here with their neighbors.
A. used to live B were used to live C got used to living
She put back the book she had taken________mistake．
| A．in |
| B．up |
| C．to |
| D．by |
________it rains heavily，they go on working outside．
| A．How |
| B．Why |
| C．Although |
| D．What |
What________is the most helpful invention？
| A．you think |
| B．I think |
| C．you do think |
| D．do you think |
The dinner didn’t start________all the friends arrived．
| A．since |
| B．until |
| C．while |
| D．by |
He is________to lift the bag full of rice onto the truck．
| A．enough strong |
| B．too strong |
| C．so strong |
| D．strong enough |