As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
Russia's withdrawal of its experts from China did not strangle (压垮) the Chinese people; _____ it stirred up their enthusiasm for greater exertions.
Because the children keep interrupting her whenever she reads a book, she is always _____ her place.
The lady who had invited us heard me telling my wife that the dinner was terrible so I was _____.
He offered to _____ her a hand as the suitcase was too heavy for her to carry.
I have been looking for this book for months, and _____ I have found it.