Sometimes Sandy with her friends _________ to the cinema at the weekend.

You must set off at once, ______you would be late for school

Most people hold the view that the key tokeeping fit is to ______ regularly．

We have taken effective measures to ________ our natural resources.[ ]

83. It is said that Hong Kong will bejoined _____ the mainland _____ a beautiful bridge on the sea in the nearfuture.