Butterflies ______ a sweet liquid produc
题型:选择题
问题:
Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect.
A.carry on
B.feed on
C.put on
D.focus on
Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect.
A.carry on
B.feed on
C.put on
D.focus on