为什么要用to settle?with a lot of difficult problems (to settle),the manager felt worried.为什么括号内不用to be settled?

为什么要用to settle?with a lot of difficult problems (to settle),the manager felt worried.为什么括号内不用to be settled? With a lot of difficult problems __the president is having a hard time 用to settle 不用to be settle 在with a lot of problems to settle 中为什么to settle不用to be settled?有短语settle the problem.故有此问.请高手指教,雨田摆渡：在There are many things to do中由于是there be 句型故主动被动均可。并不是特殊用 with a lot of difficulties to settle,they had to stay in the lab.不定式用主动to settle还是被动式to be settled? With a lot of difficult problems __to settle_,the newly-elected President is having a hard time .为什么要填to settle 而不填settled? with的复合结构作状语时,同时表示将来和被动时,逻辑谓语为什么还是用了不定式的主动式?With many problems to settle...为什么? With a lot of things____,the newly-elected president was having a hard time.A.settle B.to be settled C.to settle D.settled选什么,为什么可是was having a hard time不是过去的语态吗？为什么用C表将来呢？ It's selfish__ the matter in this way.为什么用的是of him to settle with the question ( ),they went home.with the question ( ),they went home.A to settle B settled 请问选什么为什么 It is wise of him to settle the case that way of him to settle 是选项 为什么不能填for him to settle With so many problems to settle可以换成With so many problems to be settled吗?有一个这样的完成句子题：With ________ (如此多的问题要解决),I'm afraid I can't go hiking with you this weekend.(settle)With so many problems to sett with的复合结构（选择题）With so many problems to settle,the new manager was too worried to eat anything.为什么这里不用to be settled啊,为什么不是被动啊 with a lot of problems __,the manager felt worried all the time.为什么答案是to settle,而with a lot of problems __,the manager felt worried all the time.为什么答案是to settle,而不是to be settled? Q：was Columbus among the first to settle in （what）is now the USA?为什么用what? The little boy still needs the_____20 pounds to do with some things_____.A.remaining;remained to be settledB.remaining;remaining to be settledC.remained;remained to settleD.remained;remaining to settle选哪个?为什么? with a lot of problems__ A.settled B.settling C.to settle D .being settled But now we have a score to settle with Tom as well什么意思 区别with 的用法WITH 什么时候加分词,什么时候又用不定式啊?例如with a lot of difficult problems to settle,the manager felt worried all the time.with the students following,the teather come into the classroom