Anchoring and fishing in this area are（）.

（）is prohibited in this area.

There is plenty of（）at this area.

Now this tiny housing solution is ______________ in urban areas in the U.S., and Canada.

If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.

he area for unloading goods in warehouse is（）

People wandering in the fairground or park area（）wear a uniform.

On no account （）proceed without pilot in this water area．

 ______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

Is this（）longer or shorter?

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

（）refers to a word or expression that is prohibited by the “polite” society from general use.