一、情态动词类.Facts prove that the world’s economic development is not a win—lose game but one in which all _____be winners.can B.shall C.must D.would
Helen devoted herself ________to her research and became a top scientist in the field of applied physics.
Vitamin D helps our bodies make a special chemical,and this special chemical, ______ affects our brains,making us feel happy.
Everyone must have known the death of the waitress, __________?
.一 Tony is such a selfish person. 一 I agree. Never again ________ with him.
After driving for 20 miles,Jackson realized that he ________in the wrong direction.