What you have said are old rules and they don’t the students nowadays any more.

Your essay is fairly good and yet it leaves something______

Last month’s terrible train crash in Wenzhou has shaken the country,not only causing the loss of lives,but also____peopleconfidence in the rail system. [ ]

The frightened thief hid himself in the dark corner of the yard, ____, staring at the open door.

There are_________ advertisements on Channel 7 than on Channel 8.