Jenny and Danny want TV.[ ]
A. to see
B. to watch
C. to look
答案：B
7. Everything changes _____.What was not accepted in the past may be very popular with people now.
A．in time
B．on time
C．for time
D．over time
以下何为被动免疫制剂（）。
A.菌苗
B.疫苗
C.类毒素
D.夹膜等抗原成分所制成的菌苗
E.免疫血清
