1.Such books are not worthy at all.
A.reading B. being read C. of being read D. to read
2.I can never understand the reason he explained to me.
A.why B. that C. when D. where
3.Sandy could do nothing but to his teacher that he was wrong.
A.admit B. admitted C. admitting D. to admit
4.Sales director is a position communication ability is just as important as sales.
A.which B. that C. when D. where
5.It’s such a difficult problem nobody can work out.
A.as B. that C. which D. so that