Mom，don’t you think it's OK to play once in a while ____________ it doesn’t affect my studies?
| A．even if | B．unless |
| C．so that | D．as long as |
Nowadays, more and more people are using private cars, ________ has caused a lot of traffic problems, especially in large cites like Beijing and Shanghai.
| A． that | B．which | C．it | D．they |
______, she couldn’t educate her son..
| A．A teacher as she is | B．Teacher is she |
| C．Teacher as she is | D．Is she a teacher |
________ is well known to us all is ________ Yao Ming has become the boss of the Shanghai Sharks, who attended the opening ceremony of the new CBA season on Dec. 19, 2009.
| A．It; that | B．What; what |
| C．As; that | D．What; that. |
— Have you finished all your homework?
— Of course. I ________ it before I went out to play football.
| A．had finished | B．have finished |
| C．finished | D．was finishing |
—He failed in the exam again.
—He __________his teacher’s advice.
| A．should not have followed |
| B．should not follow |
| C．mustn’t follow |
| D．should have followed |