English is too hard __ for some people.
#98662
A
to be master
B
to master it
C
to master
D
master
推荐题目
I'm pleased to see the problem _____ so quickly.
#98336
A
settled
B
having been settled
C
be settled
D
settle
Why pleasant smells do not reduce pain in man is a question still _______ by scientists.
#97245
A
answered
B
being answered
C
to be answered
D
that answered
I still remember ______ to the Famen Temple and what I saw there. 
#98911
A
to take
B
to be taken
C
taking
D
being taken