He is a poorly learnt man. But he acts as though he ().

单项选择题It is imperative that you （）there in person.

A.are
B.were
C.be
D.will

单项选择题The DMZ extends about two hundred kilometers ().

单项选择题The（）in the early 1970s worsened an already stagnant economy in Britin.

A.oill crisis
B.high inflation rates
C.lange imports
D.unemployment problem

单项选择题It is well （）the time and effort to learn how to speak English now.

A.express
B.fun
C.worth
D.convenient

单项选择题In learning English we should place emphasispractices.