Some researchers are finding that daydreaming may be important to ______ mental health. Daydreaming, they say, is _____ good means of relaxation.
| A．the; / | B．/; the | C．/; / | D．/; a |
Twenty students want to attend the class that aims to teachto read first.
| A． | what | B． | who | C． | how | D． | why |
What are you doing out of bed, Tom? You're to be asleep. ,
| A．supposed | B．known | C．thought | D．considered |
If you __ go, at least wait until the storm is over.
| A．can | B．may | C．must | D．will |
With new technology, pictures of underwater valleys can be taken color.
| A．by | B．for | C．with | D．in |
The employment rate has continued to rise in big cities thanks to the efforts of the local govenments to increase.
| A．then | B．those | C．it | D．that |