The old woman lives ________ and often feels ________.
I wonder_____ they will pass the exams or not.
The light______ by Edison is helpful for people.
—________do you practice your pronunciation?—I practice it _____ asking the teacher for help.
----Can you explain ______________________________, especially my writing?----Of course. It’s my pleasure.
----It’s a wise _______ to wear a white tie. It matches your new suit well.----Thank you very much.