虎克第一次观察细胞时，因显微镜放大的倍数太低，未能发现细胞核。( )
Customer：，are you the manager here？Manager：Yes，I am．What can I do for you？
A. I beg your pardon
B. Pardon me
C. Excuse me
D. Forgive me
The People‘s Republic of China was__________in 1949．
A. found
B. founded
C. built
D. put up
I wonderon sale．
A. how much cost these shoes
B. how much do these shoes cost
C. how much these shoes cost
D. how much are these shoes cost
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