问题
选择题
He found it hard _____ his class. [ ]
A. to catch up
B. catch up
C. catch up with
D. to catch up with
答案
D
搜题请搜索小程序“爱下问搜题”
He found it hard _____ his class. [ ]
A. to catch up
B. catch up
C. catch up with
D. to catch up with
D