Yesterday he a teddy bear.[ ]
A. buy
B. buys
C. bought
D. boughts
答案：C
下列实验操作错误的是
A. 滴加液体试剂
B. 稀释浓硫酸
C. 点燃酒精灯
D. 加热液体
I try to relax because I knew I would use up my oxygen the sooner ______ .
A．the more excited I got
B．I got excited more
C．and more excited I got
D．and I got more excited
