單項(xiàng)選擇題She's part of a team of scientists who are（）upon cancer research.

A.worked
B.arranged
C.engaged
D.involved


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1.單項(xiàng)選擇題Tourism has（）agriculture as the nation's main industry.

A.recalled
B.reckoned
C.redirected
D.replaced

2.單項(xiàng)選擇題I cannot tell the（）difference between the twins.

A.slender
B.slight
C.single
D.simple

3.單項(xiàng)選擇題This is the dictionary（）I depend a lot whenever I have problems with new words.

A.on which
B.in which
C.for hich
D.with which

4.單項(xiàng)選擇題It's no use（）with him

A.toargue
B.（in）arguing
C.argue
D.argued

5.單項(xiàng)選擇題He is over fifty, but he looks as if he（）only in his thirties.

A.is
B.were
C.will be
D.has been