—Where are Tom and Mary? --____ Tom _____ Mary is busy with their homework. You’d better play with.
As Jack left his membership card at home, he wasn't allowed_______ into the sports club.
—All the isatis root(板蓝根) is sold out! —People are crazy! experts say there is no use eating isatis root to prevent H7N9, some people still don’t believe it.
It was _______ bad weather______ they all had to stay at home.
Mary won in the_______ race last week.
—Did you notice him come in? —No, I _________a football game.