Tom's dream is to become a doctor, and he is working very hard to turn his dream ( ) a reality.
A. into
B. in
C. with
D. out
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发绀是由于血液中还原血红蛋白超过:( )
A. 3g/dl
B. 5g/dl
C. 8g/dl
D. 10g/dl
二氧化碳在血液中的主要运输形式是:( )
A. 物理溶解
B. 碳酸氢盐的形式
C. 氨基甲酸血红蛋白形式
D. 以上都不是
The bad weather had driven tourists ( ).
A. of
B. away
C. in
D. up
The company has( )a new toy and it sells well in the market.
A. worked
B. taken
C. opened
D. designed