Measures have been taken to fight ________recurring food safety problems, but there is still a long way to go before China can rid itself ________ these issues.
PART TWO LANGUAGE KNOWLEDGE
SECTION A
Directions: Beneath each of the following sentences there are 4 choices marked A, B, C and D. Choose the one answer that best completes the sentence.
21. As the Internet is expanding day by day, the opportunities for crime ______ as well.
A. has B. is C. have D. are