When my parrot is hungry, he _____ the c
题型:选择题
问题:
When my parrot is hungry, he _____ the cage_____ his beak. [ ]
A. knocks on…in
B. knocks at…of
C. knocks on…with
D. knocks at…on
When my parrot is hungry, he _____ the cage_____ his beak. [ ]
A. knocks on…in
B. knocks at…of
C. knocks on…with
D. knocks at…on