.-- It’s no easy task to catch a ticket on a website that receives 1 billion clicks daily .
--I can’t agree with you more . There _____ be errors for every single step .
| A．should | B．must | C．can | D．will |
She was working in the room suddenly she heard a boy crying and ________ out as quickly as she could to see what was happening.
| A．going | B．go | C．had gone | D．went |
I'm not sure whether this is the room ________ she left her dictionary.
| A．where | B．that | C．which | D．in that |
-When did you go to the States?
-I remember ________ there when I was ten.
| A．having taken | B．to be taken | C．being taken | D．to take |
During the scientific experiment, Mr. Chen carefully poured the water into the tube, with my classmates _______ beside to see what would happen.
| A．were standing | B．stood | C．standing | D．to stand |
I don't think he meant to hurt you yesterday. I would rather he ________ .
| A．didn't say that | B．don't say that |
| C．doesn't say that | D．hadn't said that |