成人高考英语语法归纳及练习十七(3)

this nation.

　　［A］ to believe ［B］ to be belived［C］ beliving

　　［D］ have belived6） The green turtle has been known over 2，000 miles to return to a nesting site.

　　［A］ in the navigating ［B］ the navigation ［C］ to navigate ［D］ navigation

　　7） For the ［A］ first time Venusian scientists managed landing ［B］ a satellite on the planet Earth， and it has been sending ［C］ back signals as well as ［D］ photographs ever since.

　　8） The day is past when Chinese universities and colleges to give high school diplomas to all who sit through four years of instruction， regardless of whether any visible results can be discerned.

　　［A］ afforded［B］ affording［C］ to afford

　　［D］ can afford从上例我们可以看出afford一般与can和can't或could和couldn't连用。

　　2. 动词＋疑问代（副）词＋不定式

　　这类动词常见的有：advise，decide， discuss， find out， forget， inquire， know， learn， regard， remember， see， settle， teach， tell， think（=consider）， understand， wonder等。这些疑问代（副）词有what， when， where， which， how， whether等，但不包括why，如：

　　He does not know how to go there

　　when to s