-What do you think of Mr Li's lecture?-Clear and __________ the point.
—Believe it or not,my sister and I are twins. —Oh,you must have had the case________you were taken for your sister.
-I expect everything will turn out as you wish.-_______.
Sam has been appointed ________ manager of the engineering department to take ________ place of George.
With the loss of labor,the old farmers ________at home had to choose less laborintensive crops.
Many old houses have beento make way for new roads.