______ to sunlight for too much time will do harm to one’s skin. 
#89997
A
After exposed
B
If exposing
C
Having exposed
D
Being exposed
推荐题目
Certainly I posted your letter---I remember ____it.
#98874
A
posting
B
to post
C
to be posting
D
have posted
Many problems concerning the improvement of our school remain ________.
#96679
A
solving
B
solved
C
to solve
D
to be solved
The professor has received the letter ____ to give a lecture in ftinceton Institute.
#98041
A
being invited
B
to be invited
C
inviting him
D
invited