----What a nice bike! How long ____ you ____it? ----- Just two weeks.
| A．have, bought | B．did, buy |
| C．have, had | D．are, having |
When his wife died, he lived ______; his lovely pet dog made him feel less ______.
| A．alone, alone | B．lonely; alone |
| C．lonely; lonely | D．alone; lonely |
All the students know shouting at the elderly is impolite.
| A．can | B．could | C．must | D．need |
We can’t work out this problem. Can you tell us ______ ?
| A．how to do | B．what to do it |
| C．how to do it | D．what should to do |
—Don't talk in the library. Always keep quiet here. —_________.
| A．I see. | B．Yes, I am. |
| C．I can. | D．I do. |