. ---Did he hear of the news that his son sacrificed in the war? ---No. It was he received the call from the army he knew it.
So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .
I have never seen the word ______ that way before.
I appreciated ____ the opportunity to study abroad two years ago.
The International Day against Drugs, aimed at warning people to keep away from drugs, _________ on June 26th every year.
. Progress so far has been very good. _______, we are sure that the project will be completed on time.