They have________signs in some places to remind (提醒)the visitors not to step on the grass.
| A．put on | B．put up | C．put down | D．put out |
The poor ________ living in the mountain ________ top is covered with green trees.
| A．are; which | B．are; of which | C．is; whose | D．are; whose |
As ________ as the sky is your mind. As deep as the sea is your kindness.
| A．broad | B．aboard | C．abroad | D．board |
No one _______ the building without the permission of the policeman.
| A．is leaving | B．will be leaving | C．has left | D．is to leave |
The new bridge is ________ the one built last year.
| A．three times as wider as | B．three times the width of |
| C．three times the width | D．as three times as |
She ________ down her book and ________ in bed.
| A．laid; lay | B．lay; laid | C．lay; lay | D．laid; laid |