M-K-G (a) How many classes a week do you have? (b) How many classes do you have in a week? Are these both ordinary? Or is either of them m...
M-K-G (a) I thought Mary would be [was] the last to marry, but she had become a mother of a child before I knew it. I think this sentence ...
M-K-G (a) The structure of this and that protein is quite little different. (b) The structures of this and that protein are quite little diffe...
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|The First Time (4)|
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|To Start / To Start On (5)|