The basic design of the car is very similar to ________ of the earlier model.

He didn’t make ________ clear when and where the meeting would be held. . 

The boy became fatter and fatter each day and_____ made his parents sad.

In fact, ＿＿＿is a hard job for the police to keep order in an important football match. 

______of them knew about the plan because it was kept a secret.