1 I'm sorry I stepped outside for a smoke .I was so tired.Where is no ( )for this while you are on duty.

1 I'm sorry I stepped outside for a smoke .I was so tired.Where is no ( )for this while you are on duty.
A reason B excuse C cause D explanation
2 If you ( ) practising the piano every day,you could become quite a good musician.
A stick to B keep up C insist D suggest
3 He came to my class every week ,but his attitude ( ) he was not really interested in the subject
A expressed B described C explained D suggested
4 This the shop ( ) I often speak to you
A where B which C of which D in which
5 ( ) the engine is concerned,the car is fine.But the body-work needs a lot of attention.
A As long as B As far as C As soon as D In case
6 The police forbade ( ) out of the building
A him to go B to let him go C him from going D from his going
7 The new machine ,if ( ) properly,will work for at least ten years.
A use B using C being used D used