Her hands________rough.She must have done a lot of heavy physical work.[ ]

When ____ about the source of hisincome, he hesitated for a moment, obviously not willing to give us a directanswer.

I can’t find my purse anywhere. — You ____ have lost it while shopping. [ ]

I saw a boy in the supermarket yesterday, reminded me of my good friend.

By the time the girl comes back to life，scientists probably________a cure for this incurable disease