The two top students in Mr. Green’s class competed _____ each other for the highest marks.
| A．to | B．for | C．in | D．Against |
Young people tend to get up very late unless ________ to rise early.
| A．required | B．requiring | C．they were required | D．to require |
No reader ________ take away a book from the library without the permission of the librarian.
| A．need | B．might | C．shall | D．will |
. --Did you see ________ may be the longest total solar eclipse （日全食）in 500 years yesterday?
--No, it was cloudy above my city at that time.
| A．what | B．that | C．who | D．all |
________ a two-year period, Nancy became addicted to painkillers （止疼药）.
| A．Beyond | B．Above | C．Since | D．Over |
. At noon in summer the villagers like to seek shade ________ the air is cooler.
| A．in where | B．in which | C．where | D．the place where |