It is not socially ______ for parents to leave children unattended at that age.
| A．accessible | B．acceptable | C．adorable | D．adaptable |
Had the weather been good, the children ____ out for a walk.
| A．had gone | B．could have gone | C．would go | D．went |
The news has just ___ that the president is going to visit China next month.
| A．come out | B．put out | C．let out | D．given out |
By looking at a problem in as many ways as possible, creative thinkers can find solutions that would ___ remain invisible.
| A．otherwise | B．yet | C．already | D．forever |
It was foolish of you to take a taxi ___ you could easily walk there in five minutes.
| A．while | B．when | C．since | D．before |
He is only too ready to help others, seldom, ____ refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if no |