根据句意，用括号内所给单词的适当形式填空。

小题1:Jerry       （go）to school at seven o’clock.

小题2:Can you play the violin         （good）?

小题3:It takes      （she）an hour          （do）her homework.

小题4:Look! The two girls            (talk) over there.

小题5:We need help for our        （swim）club.

小题6:Let’s          (see) the pandas first.

小题7:He is an           (America) boy.

小题8:          (not be) late for school again.

为避免或减少肝脏的首过作用，肛门栓应塞入距肛门处（）

A.2cm

B.4cm

C.6cm

D.8cm

E.10cm