On ________ Friday when Tom was having an art lesson，as he had no color pencils with him，he drew ________ blue sun with his pen.
| A．/；the | B．/；a | C．the；the | D．a；a |
—________ you interrupt now? Can't you see I'm on the phone?
—Sorry Sir, but it's urgent.
| A．Can | B．Should | C．Would | D．Must |
As is reported, it will be more than 20 years ________ humans are able to walk on Mars.
| A．before | B．when | C．since | D．after |
Be careful that a good name of a product doesn't ________ mean good quality of it.
| A．alternatively | B．approximately |
| C．obviously | D．necessarily |
The supermarket rules state that no goods ________ be taken out of the supermarket, ________ paid for by the shopper.
| A．must; once | B．should; when |
| C．can; if | D．shall; unless |
As usual, the 2013 Spring Festival Gala _____ on New Year's Eve, which attracted almost all the Chinese.
| A．took up | B．took in |
| C．took over | D．took place |