31.Every solid object______reflect a sound,varying according to the size and nature of the object.
We went back to the street and to the house, in front of ______ we had found the BlackBerry cellphone.
When a friend of mine comes _____ difficulties, I will give him or her my hand the first time.
Mum thanks for supporting me ______ these years.
That was the last time I saw my father before he _____.
I seemed to be pretty good___ reading his lips after a while, even better than the nurses that were caring ___ him.