-What did your parents think about your decision?

-They always let me do          I think I should.[ ]

A.when

B.that

C.how

D.what

引起尖锐湿疣的病毒通常不包括下列哪型（）

A.HPV1型

B.HPV6型

C.HPV11型

D.HPV16型

E.HPV18型