— 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．will | D．can |
Don’t forget the day ____ you were received into the Youth League.
| A．when | B．that | C．at which | D．where |
I’ve finished writing the novel, ____ is to be published next month.
| A．that | B．what | C．which | D．when |
He returned home safe and sound after a fierce battle, ____ was unexpected.
| A．which | B．as | C．that | D．it |
____ we is known to all, English is not very difficult to learn.
| A．What | B．As | C．That | D．Which |
The old man had three sons, all of ____ died during World War Ⅱ.
| A．whose | B．that | C．whom | D．who |