Many scientists have been probing psychological problems.
A．solving
B．exploring
C．settling
D．handling
第1题：
A. have been working out
B. have been working
C. have been working on
D. have been building on
第2题：
Have you ever been to the place? You can see many places of interest there．（合并为一句）
Have you ever been to the place ________you can see many places of interest?
第3题：
(A) were being told
(B) have told
(C) have been told
(D) told
正确答案：C
解答参考：在本句中，首先主语children和谓语tell是被动关系，所以排除B和D。而选项A是被动语态的过去进行时形式，句中many times表示该动作多次发生，所以用现在完成时。【译文】多次告知孩子们不要走近湖边。
第4题：
Scientists have many theories about how the universe ___ into being.
A. cameB. was coming
C. had comeD. would come
第5题：
A.have been proved
B.have proved
C.has proved
D.has been proved
第6题：
Have you ________ Japan? Yes ,many times
A.been to
B.gone to
C.arrive at
D.reach
第7题：
A、have had worked
B、have been working
C、are working
D、work
第8题：
A.to make
B.to have been made
C.to have made
D.to be making
第9题：
You, like many of your classmates, probably have been in such a situation where you are asked to do something to help a foreign friend. (翻译)
第10题：
________for many years,the AB passed the examination and became an officer.
A.Having ignored him
B.To have been ignored
C.To be ignored
D.Having been ignored