—Must I turn off the gas after cooking?
—Of course, you can never be ____careful with that．
| A．enough | B．very | C．so | D．Too |
We waited and waited until the wind ____________ and then we started with our trip again.
| A．died away | B．died out | C．died down | D．died off |
--- It was not until she had arrived home _________ her appointment with the doctor.
| A．when she remembered | B．that she remembered |
C．did she remember |
D．and she remembered |
The professor sort of dislikes the student, because he always asks some questions that have nothing to _______ his lessons.
| A．deal with | B．do with | C．connecting with | D．go with |
The father as well as his three children________ skating on the frozen river every Sunday afternoon.
| A．is going | B．go | C．goes | D．are going |
My sister______ the League last month and she has decided to ______ the activity to help the aged next week.
| A．joined; join in | B．took part in; join | C．joined; attend | D．joined in; join in |