_____ has already been pointed out, grammar is not a set of dead rules.
| A．As | B．It | C．That | D．Which |
After five days’ climbing in the mountain, they reached ____ they thought was the place they’d been dreaming of.
| A．that | B．where | C．which | D．what |
I’m moving to the countryside because the air there is much fresher than ____ in the city.
| A．ones | B．one | C．that | D．those |
--- Can I call for some friends and spend the day outside with them, Mom?
--- ____ I’ve told you to have a weekend on your own.
| A．Why so? | B．Why not? |
| C．How come? | D．So what? |
--- I hear Robert has gone to Harvard University for his master’s degree.
--- Oh, how nice! Do you know when he ____?
| A．was leaving | B．left | C．had left | D．has left |
--- Did your boss phone you again the next day?
--- No, it was a fortnight ____ he gave me a second call.
| A．that | B．when | C．before | D．since |