David worked hard at his lessons ____ he gained high grades in the exams.
| A．so that | B．in order to | C．though | D．because |
Is this dictionary _____ you bought yesterday?
| A．that | B．which | C．the one | D．where |
The skirt ______ she spent 50 yuan is very beautiful on her．
| A．in which | B．on which | C．for which | D．with which |
He must be from America, ____ can be judged from his accent.
| A．that | B．which | C．it | D．where |
This is the hotel ______ we stayed last year.
| A．where | B．it | C．which | D．that |
Do you know when Mr. Brown _______? When he _______ , please let me know.
| A．will come; will come | B．comes; is coming |
| C．is coming; comes | D．comes; will come |