--- How old are you, madam?
--- If you _______ know, I’m twice my son’s age.
| A．can | B．must | C．may | D．should |
______, a small advertisement held my attention, which read “Easy job．Good wages．No experience necessary．”
| A．Looking through the newspaper |
| B．While I was looking through the newspaper |
| C．To look through the newspaper |
| D．I was looking through the newspaper |
Obama says he is angry about policies that always favor the wealthy and powerful over ______ Americans and insists that opportunities be opened up to all．
| A．average | B．intelligent | C．competitive | D．original |
It is required that all traffic participants should___the traffic rules to make traffic safer and faster．
| A．perform | B．possess | C．observe | D．support |
______ it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal．
| A．When | B．As | C．While | D．Before |
Johnson was much depressed as he didn’t sell half as many computers as he thought he____．
| A．will | B．did | C．was | D．would |