Billy is a nice boy . he knows a lot , b
题型:选择题
问题:
Billy is a nice boy . he knows a lot , but he never ________.
A. shows off
B. picks up
C.falls off
D. looks up
Billy is a nice boy . he knows a lot , but he never ________.
A. shows off
B. picks up
C.falls off
D. looks up