His explanation was so confusing that I could hardly make anyof it at all.

Cars play an important role in modern life, but they ______ also cause many problems like air pollution.

I don’t become a serious climber until the fifth grade, ______ I went up to rescue a kite that was stuck in the branches of a tree.

______, so he didn’t come to school last week.

‘s that noise Is the water stillrunning— Oh, my god! I ________to turn itoff after I brushed my teeth