Studies have shown _____ teenagers often suffer from depression .A.thatB.whichC.in wh

Statistical studies show that__________．A.courtroom testimony only confuses the judge###SX

Jack_____out very early, for he had not shown up at breakfast.A．could have goneB．must have

They _______ thankful to have the opportunity to further their studies. A：would like to

______studies the meaning of language.A．MorphologyB．SemanticsC．SyntaxD．Etymology

Investigations______ the origins of life on the earth have shown that, given earth－like co

Both studies on flaxseed and ginseng show________