在牙嵌式应用最广泛的是（）

A.三角形齿

B.梯形齿

C.矩形齿

D.都不是

-Julia Morgan, the famous movie star, plans _________ a relaxing vacation

in Spain.

-I hope he will have a good time.[ ]

A. having

B. has

C. to have

D. have