By dint of much practice, he became ______ and was able to sign his name with either hand.

Too much air in the furnace of an oil－fired boiler would be indicated by _____.A.yellowish

（Only) by practice （will you) be able to improve your （speaking) English and gradually （sp

The millions of calculations involved, ______ by hand, would have lost all practical value

To learn French well,____.A.one needs much practiceB.much practice needed by oneC.much pra

He is a man of great experience , _______ much can be learned. [ ]A. who B. thatC. from which D. fro

He is, by far, and will be for a time______, the best basketball player in the history of