Encouraged by my science teacher, I set about my studies on developing my product, _____I hope I will succeed in applying for a patent(专利).
He was so absorbed in his work that not a sound ______.
The singing group was so well received that the size of audience, ___ we had expected, was well over one hundred.
Mr. Zhang said that he would be punctual for the appointment, _______ he were late?
I am willing to do whatever my country requires _______ me?
Compared with the nervousness of driving in the rain or snow, it is ______ to sit in a train without any worry of bad weather.