某班共有52人，现根据学生的学号，用系统抽样的方法，抽取一个容量为4的样本，已知3号、29号、42号同学在样本中，那么样本中还有一个同学的学号是(      )

A．10

B．11

C．12

D．16

小题1:Why did you keep ________(沉默) at the meeting? We need your suggestions!

小题2:Kangkang’s father is going to Shanghai on _________. (出差)

小题3:The trees have a great _______ (影响) on the climate.

小题4: He has ________ (成功)in winning the first prize in the game recently.

小题5: This is my personal ________（经历）. What about yours?

小题6:There is no doubt that Diaoyu Island _________(属于)to China.

小题7:Thank you for ________(邀请) me to go on holiday with you.