【题目】The research lacks evidence, and therefore, its conclusions are doubtful.
A.solid
B.fierce
C.severe
D.potential

A.From booksB.On TV.C.Through the Internet.

【题目】We live in an age more information is available with greater ease than ever before.
A.why
B.when
C.to whom
D.on which

【题目】I think Tom, as the head of a big department, should either study regularly or______ his job.
A.quits
B.to quit
C.quitting
D.quit

A.Go to 7th street.B.Show another shirt.C.Call another branch.

【题目】Your as a student will be excellent if you develop a habit of reflecting on how you learn.
A.operation
B.growth
C.performance
D.character

A.neither am IB.either is mineC.neither is mineD.so is mine