This chapter is so difficult to ______ that I shall have to read it again later.
#72871
A
read
B
know
C
find
D
digest
推荐题目
My father used _______in front of his house and he got used to _______like that.
#64386
A
to sit; doing
B
to sitting; do
C
to sit; do
D
to sitting; doing
My robot caught a virus, so my flat was _____.
#67468
A
in the mess
B
in a mess
C
in the messes
D
six and seven