They always lay a large supply of tinned food in winter in case they are snowed up.
| A．out | B．off | C．in | D．with |
He is _________to staying up late and getting up late.
| A．accustomed | B．applied | C．adjusted | D．adapted |
None of us was good at swimming, so the crossing of this dangerous river was really a_________.
| A．motivation | B．symptom | C．conflict | D．challenge |
Sometimes_________good knowledge of_________ first aid may mean the difference between life and death.
| A．a; / | B．/; the | C．/; / | D．a; the |
-- I will take part in the English lecture competition next week.
-- ________.
| A．Come on | B．Congratulations | C．Good luck | D．Never mind |
. The glass doors have taken the place of the wooden ones at the entrance, ________ in the natural light during the day.
| A．to let | B．letting | C．let | D．having let |