Old Richard,        ill so long, is losing his memory and needs to be attended to. 
#88627
A
to be
B
being
C
having been
D
to have been
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
The teaher told his student ___ any noise in class.
#97723
A
to not make
B
not to make
C
to make
D
not making