Present Perfect Simple and Usage of Since/For

They have visited their grandparents _______________.

• STILL

• JUST

• RECENTLY

• NEVER

Have you ______________ been to London? (experience)

• EVER

• NEVER

• ALWAYS

• SOMETIMES

I have ____________ been to London. ( - )

• never

• just

• recently

• already

I have ____________ been to London. (+)

• ALREADY

• NEVER

• YET

• STILL

Has your brother bought the tickets ____________ ?

• YET

• ALREADY

• SOON

• NOW

I haven’t been to London ____________ ( - )

• YET

• JUST

• RECENTLY

• NEVER

I ____________ haven’t found what I'm looking for.

• SO FAR

• NEVER

• RECENTLY

• STILL

The teacher has ____________ arrived.

• just

• yet

• never

• still

I have written 5 books _______________.

• YET

• JUST

• RECENTLY

• SO FAR

_______________ two weeks.

• For

• Since