知识点拨：
1. cause v.造成；引起，后接名词或复合宾语。
Eg. Smoking can cause lung cancer.
cause 还可以用作名词，意为“原因，起因”。
Eg. The cause of the fire was a cigarette-end.
2. effort n.努力
Eg. You can’t succeed without effect.
make every effect to do sth. 意为“尽一切努力做某事”
eg. Everyone should _____ _____ ______ _______ reduce pollution.
人人应该尽一切努力来减少污染。
3. get involved in “参与；耗费很多时间”，后跟名词、代词或动名词形式。其中get为系动词，可以和be动词和become换用。
Eg. All the students got involved in the discussion.
He got involved in __________ (work) out the plan.
