High schools are made up of（）different types of schools with somewhat different tasks.
A. four
B. three
C. five
D. None of the above
Hi! George. How are you? ―（）
A. That's all right
B. Don't mention it.
C. How are you?
D. Fine, thanks. And you?
A fid is a（）.
A. mallet used when splicing wire rope
B. sharp pointed crow bar used to unlay wire rope
C. tapered steel pin used to separate wire rope
D. tapered wooden pin used when splicing heavy rope
微信支付 
支付宝支付