We are sure that () to do this face to face, he would find it difficult to express himself without losing his temper.

A. were he to try

B. would he try

C. was he trying

D. if he tries

“征税凭借国家政治权利，通常颁布法令实施，任何单位和个人不得违抗”。这句话表述的是税收的（）特征。

A.强制性

B.无偿性

C.固定性

D.有偿性