______ has been called the "cradle of American Liberty".A．PhiladelphiaB．PlymouthC．BostonD．

The sounds we call words can be called a language only if ______.A．each sound has a differ

The project _____ by the end of 1998.A.had been completedB.had completedC.has been co

In the past decades there has been a big_______.A

A market order that executes after a specified price level has been reached is called_____

The conference has been held to discuss the effect of tourism ________the wildlife in

Since ancient times the value of chicken soup______A.has been over-estimatedB.has been wi