The keeper of the spring cleared away the leaves and branches, and wiped away the silt(淤 泥) that would _______ have choked and polluted the fresh flow of water.
| A．thus | B．otherwise |
| C．therefore | D．later |
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 |
I'm afraid this painting is not by Picasso. It's only a copy and so it's _____.
| A．priceless | B．invaluable | C．unworthy | D．worthless |