China’s first compulsory safety regulation on primary buses, which requires every seat to have a seat belt, will ____ on July 1.
| A．have an effect | B．take effect | C．bring into effect | D．come to effect |
Since Tom ______ downloaded a virus into his computer, he can not open the file now.
| A．readily | B．horribly | C．accidentally | D．irregularly |
It is not socially ____for parents to leave children unattended at that age.
| A．accessible | B．adorable | C．adaptable | D．acceptable |
.I hope I will not be called on in class as I’m not yet____prepared．
| A．attentively | B．readily | C．actively | D．adequately |
You can see the stars on a clear night, but in the daytime they are ____ .
| A．unavoidable | B．invisible | C．inaccessible | D．unavailable |
.—Do you need any help, Lucy?
—Yes. The job is ____ I could do myself.
| A．less than | B．more than | C．no more than | D．not more than |