There are signs______the worst of the recession may be over.A．whichB．thatC．whyD．what

There is always the ____of an earthquake in this region, but so far there has been no sign

There are ______ major periods in the drama of the West.A.FourB.FiveC.SixD.Three

There are ten stories in this book,______are the most interesting ones.A．the first four of

The argument remained heated ______ there are necessary conditions of existence such a

There are signs______the worst of the recession may be over.A.whichB.thatC.whyD.what

There are strict rules_____the use of chemicals in food