A.lackingB.losingC.missingD.droppingJohn complained to ……

单项选择题（）is known to the world，Mark Twain was a great American writer．

A.As
B.Once
C.That
D.It

单项选择题I haven´t been to a pop festival before and Mike hasn´t （）．

A.too
B.as well
C.neither
D.either

单项选择题You´d better take these documents with you（）you need them for the meeting．

A.unless
B.in case
C.until
D.so that

单项选择题If their marketing team succeeds，they （）their profits by 20percent．

A.will increase
B.would be increasing
C.will have increased
D.would have been increasing

单项选择题Nowadays little knowledge （）to be a dangerous thing．

A.seem
B.seemed
C.does seem
D.do seem