The expo is being held in Shanghai, _______a lot of advanced technology is shown for the first time.
| A．why | B．which | C．when | D．where |
______ has passed the test will get a prize.
| A．Whoever | B．No matter who | C．Whomever | D．Who |
The question came up at the meeting_____ we had enough money for our research.
| A．that | B．which | C．whether | D．that if |
I hate _____ when people talk with their mouths full.
| A．it | B．that | C．these | D．them |
Many of them turned a deaf ear to his advice, _______ they knew it to be valuable.
| A．as if | B．even though | C．now that | D．so that |
Helen ______ her keys in the office so she had to wait until her husband ______ home.
| A．has left; comes | B．left; had come |
| C．had left; came | D．had left; would come |