It is said that by no means _____to get into this laboratory without Mr. Jackson’s permission. [ ]

The natural protection zones protect animals _____.[ ]

What is your sister going to be ________ she growsup–She is going to be an engineer.

Some of you may have finished unit one. _____ , you can go on to unit two.

The meeting ________ over, all of them left the room, ________ to lock the door.[ ]