Days later, my brother called to say he was all right, but ________ say where he was. 

 -- Whose French book is it?-- It __________ be Lucy’s. Look! Her name is on the book!

--Let’s go to the Tian’anmen Square by taxi. --Oh, it’s not far from here. We_______ take a taxi.

 --My computer ____start, no matter how hard I try.--It might have crashed.

-- Mum，can I go on a holiday with my classmates this summer vacation?-- OK．You __________ have a chance if you get along well with your studies．