This is the hotel ______ we stayed last year.
| A．where | B．it | C．which | D．that |
Her grandmother has taught in this school _______ she became a school teacher.
| A．before | B．since | C．until | D．after |
Is this the hotel ________ you stayed the first time you were here?
| A．which | B．when | C．that | D．where |
Please ask ________ not to skate on the thin ice.It’s very dangerous.
| A．they | B．them | C．their | D．theirs |
Jack, you’ve done your homework, ________ you?
| A．haven’t | B．don’t | C．won’t | D．do |
When I got up that morning, I found ________ elephant standing by the window.
| A．a | B．an | C．the | D．不填 |