She ... (write) three letters today.
has written
... she (clean) her room?
Has she cleaned her room?
It ... (become) very cold recently.
has become
He ... (finish) his homework.
has finished
The car ... (break) down again.
has broken
The student ... (not/prepare) the lesson.
hasn't prepared
My dog ... (learn) a new trick.
has learned
He ... (not/lose) his phone.
hasn't lost