It was __________________ back home from work.

For weeks, the street hasn’t been cleaned by the cleaners, _______makes it very dirty.

How do you learn English, Tony – I usually practice English ________chatting with my American friends.

What upsets him?—–_____ his computer is out of order．

It was the belief _____ Alex Haley could find his “root” in Afric______ made him decide to go to Gambia.