Past Perfect and Past Simple

He ........ to Washington many times before they visited it with his class.

• went
• has gone
• had gone
• has been going

By lunch time, we ........ all the homework.

• finished
• had been finishing
• had finished
• has finished

When the dog ....... the thief, it ............. to bark.

• had seen / had begun
• saw / had begun
• had seen / began 
• saw / began

He ................  why his boss ............ him

• not understood / had fired
• didn't understand / fired 
• didn't understand / had fired 
• hadn't understood / had fired

John............out when I arrived in the office.

• gone
• had gone
• went
• has gone

When they ...............  we had already started cooking.

• had arrive
• arroved
• arrived
• arrivig

He was very tired because he ............... well.

• slopt
• had  slept
• slept
• hadn't slept

Before the students ....................... the test they ......................their mobiles. 

• start/switch
• started/had switched
• start/had switched
• starts/had switched

Kevin ............... home by the time I arrived.

• go
• went
• had go
• had gone

We ......... hungry because ......................

• were/had eaten
• were/hadn't eaten
• was/had ate
• were/didn't ate