Complete these sentences with is/isn't, am/am not, are/aren't

Complete these questions with have or has and the correct form of the verb in brackets.(Present Perfect Tense)

1. 
   ____have__they ____changed_______(change) the Internet Service Provider?
   
2. 
   ___have____you checked__________(check) the remaining disk space?
   
3. 
   ___have ___you ___installed__________(install) or ___uninstalled____________(uninstall) software recently?
   
4. 
   ________has_Dillipupdated_____________(update) the drivers recently?
   
5. 
   _______have__you _called_________(call) IT Help Desk?
   

Use the present perfect to make positive or negative sentences.

Example: the screen/go/blank

The screen has gone blank.

1. 
   The charger/stop/working The charger has stopped working
   
2. 
   I/not/upgrade/the operating system Ihave not upgraded the operating system yet.
   
3. 
   She/not/install/the updates She has not installed the updates yet
   
4. 
   They/reinstall/the application They have reinstalled the application
   
5. 
   She/not/be able to fix the problem She has not beeb able to fix the problem yet