Going “green” （)have to be a challenge.A、 don’tB、 doesn’tC、 is

I’m ___ enough to know it is going to be ？

— Look, it be Mr. Green.— It _____ be him. He has gone to France.A、must, can’tB、can, mus

Buildings in the southeast of the UK are going to have to be constructed______those in Sco

Buildings in the southeast of the UK are going to have to be constructed______those in Sco

（） is the name given to a “secret” access route into the system.A.Password B.

I am going as a 【favor 】to Ann because I have to.