1. —Would you mind my using your bicycle for a while?
— _________, but do return before 11.
A. No problem B. Not at all C. A pleasure D. Sorry but I do
2. Since no other way to escape from the flood, ____ only safe thing is to take ____chance.
A. an ; 不填 B. the ; a C. an; a D. 不填；the
3. — How many of them do you want to act in the play?
—_______ , and still a large number needed!
A. All B. Both C. Neither D. None
4. Theory is based on practice and ________ serves practice
A. in turn B. by and by
C. by chance D. in this case
