— Must I turn off the gas after cooking?
— Of course. You can never be________ careful with that.
| A．enough | B．too | C．so | D．very |
IamnotsureifTom____home.Ifhe________, I'llcallyou.
| A．willcome,willcome | B．comes,willcome |
| C．will come, comes | D．will come, come |
It_______me15minutestogettoschoolonmy bike.
| A．costs | B．spends | C．takes | D．take |
------Whyareyouso________?
-------Iamwatchingan_______basketballmatch.
| A．excited,exciting | B．exciting,excited |
| C．excited, excited. | D．exciting ,exciting |
The math problem is too difficult ,I can’t__________ .
| A．work out it | B．work itout |
| C．work them out | D．put it out |
Many old men prefer __________ in a peaceful countryside.
| A．to live | B．living | C．live | D．lived |