5道英语选择填空题,

5道英语选择填空题,
1、It is not ______ for me to return all the books to the library now because I still need some of them for my research.（1分）
A、continuous\x05B、difficult
C、convenient\x05D、sufficient
2、Whether they can finish the task before this Friday depends on which method they will ______ to the experiment.（1分）
A、adapt\x05B、adopt
C、add\x05D、address
3、Iˊll buy a new watch ______ late next time.（1分）
A、not so as to be\x05B、as not to be so
C、so as not to be\x05D、so as to be not
4、When learning a foreign language,the best ______ is to speak as much as possible.（1分）
A、advantage\x05B、approach
C、access \x05D、principle
5、They guaranteed our victory and ______ our victory helped them a lot.（1分）
A、on turn\x05B、in turns
C、in turn\x05 D、in return