Present perfect 現在完成式

____ you written the letter ____?

• Has / yet

• Have / already

• Have / yet

Irene _______ to the UK. She's not in Taiwan.

• has been

• has gone

• has go

Tina and I ________ each other for ten years.

• have known

• have knew

• have know

_____ you _____ eaten frogs before?

• Have never

• Have ever

• Have yet

I haven't _______ the soup _______.

• finishes / yet

• finished / yet

• finished / now

_____ Tom done his homework? No, he ______.

• Has / has

• Have / haven't

• Has / hasn't

Mom ________ out the trash ______.

• has taken / already

• has took / already

• has taken / yet

Mary has ____ songs _____ two hours.

• sung / for

• sung / since

• sung / with

Rita has practiced math _____ three hour ago.

• for

• to

• since

_____ you mopped the floor ______?

• Have / yet

• Have / already

• Has / yet