She asked her father what he ……..if he ……a president.

          A. would do – were                                             B. will do – is     

        C. would have done – had been                                        D. would do - is

5.     My father couldn’t make his motorbike to start this morning.

                               A                                B          C               D

: Khi cho NH₃ tác dụng với Cl₂ dư, sản phẩm thu được là:

A. HCl, NH₄Cl.                   B. N₂, HCl.                     C. NH₄Cl, N₂.                 D. N₂, HCl , NH₄Cl.