问题
选择题
When my cat is hungry, he _______ the cage door _______ his paw.
A.knocks on, in
B.knocks at, with
C.knocks on, by
D.knocks at, uses
答案
:B
: knock at sth with sth,意思为用···敲···,故选B
When my cat is hungry, he _______ the cage door _______ his paw.
A.knocks on, in
B.knocks at, with
C.knocks on, by
D.knocks at, uses
:B
: knock at sth with sth,意思为用···敲···,故选B