【B13】
A. completely
B. perfectly
C. also
D. quite
【C4】
A. usage
B. application
C. use
D. utility
A．George cursed him back.B．George was going to kill him.C．He felt ashamed because Geor
A. George cursed him back.
B. George was going to kill him.
C. He felt ashamed because George was angry.
D. He was afraid of being treated the same way as the chicken.
What do we learn about scientists in earlier times？
A. They claimed to know nothing about nature.
B. They believed in results from scientific observation.
C. They paid much attention to the problems they didn't understand.
D. They invented false theories to explain things they didn't understand.
微信支付 
支付宝支付