In the last six to nine months，teens in the US to text messaging in numbers twice that in Europe and Asia．
| A．took | B．have taken | C．had taken | D．would take |
That year his total income, with his reward , 12,000 yuan.
| A．added to; added up to | B．added; added to |
| C．added up to; added | D．adds to; adds up to |
----Are you happy with this laboratory?
----Not a little. We can’t have _________.
| A．a worse one | B．a nicer one |
| C．such a worse one | D．such a nicer one |
Some companies have introduced flexible working time with less emphasis on pressure ____.
| A．than more on efficiency | B．and more efficiency |
| C．and more on efficiency | D．than efficiency |
From Mum’s love, patience and understanding, I have learned what a huge responsibility ___ is to raise a child.
| A．it | B．that | C．this | D．one |
–Who has broken the window in my room?
--Who else ___ it but your naughty son!
| A．could do | B．could have done | C．might do | D．must have done |