The limits of a person’s intelligence, generally speaking ,are fixed at birth, but he reaches these limits will depend on his environment.
| A．where | B．whether | C．that | D．why |
There is an ongoing debate about the potentially harmful effects ________ text messaging can have on people's grammar.
| A．what | B．who |
| C．that | D．whose |
We invited her to dinner but she didn't bother to ________.
| A．turn on | B．turn away |
| C．turn up | D．turn out |
________ the words，the daughter understood what her mother was trying to tell her.
| A．To be heard | B．To hear |
| C．Heard | D．Hearing |
This vase ________ perfect but for a few small holes in its base.
| A．would have been | B．should have been |
| C．shall be | D．would be |
Tom sacrificed his personal life ________ he could get ahead in his career.
| A．in case | B．as if |
| C．so that | D．only if |