—How did you work out the Math problems?—Not able to ________ such difficult problems on our own, we had to turn to the teacher for help.
“China Daily”, whose editorial office is in Beijing, also has _______ in all major cities in China.
“Sorry, sorry…”, he whispered, _______ talking to himself.
Not a single word_______ when _______about his late mother.
As a result of the earthquake, two-thirds of the buildings in the area________.
He came back late, _______ which time all the guests had already left.