问题
选择题
My pen pal Andrew found it difficult _____ Chinese well [ ]
A. learning
B. learn
C. to learn
D. learned
答案
C
搜题请搜索小程序“爱下问搜题”
My pen pal Andrew found it difficult _____ Chinese well [ ]
A. learning
B. learn
C. to learn
D. learned
C