In the US, students can do almost anything they want in class, ____ they don’t make too much noise or disturb others who want to learn from the teacher.
| A．even though | B．now that | C．so that | D．as long as |
I really don’t know _________ I had my money stolen.
| A．when was it that | B．that it was when |
| C．where it was that | D．it was where that |
You will fall in love with that city _____ you learn about it.
| A．since | B．while |
C．before | D．once |
Many websites have been _______ to help people study foreign languages.
| A．set off | B．set up |
C．set down | D．set out |
This is the deepest swimming pool _______ I have ever seen in China.
| A．that | B．what |
C．where | D．Which |
Kathy told me that all the doors and windows _______ when she arrived this morning.
| A．have cleaned | B．have been cleaned |
C．had cleaned | D．had been cleaned |