24. —Who______ it be that is knocking at the door? —It ______ be father, but I’m not sure.
We had wanted to finish our task by noon,but it didn't quiteas planned.
that Marie was able to set up new branches elsewhere.
As a result of the serious flood,two-thirds of the buildings in the area.
____parents say and do has a life-long effect on their children.
Though he started late,Mr.Guo played the piano as well as,if______,Miss Liu.