问题
选择题
．Our teacher is very busy.He is ________ in working out a teaching plan.
A．involve
B．involving
C．involved
D．to involve
答案
答案：C
C [be involved in “从事，忙于”，是固定短语。]
搜题请搜索小程序“爱下问搜题”
．Our teacher is very busy.He is ________ in working out a teaching plan.
A．involve
B．involving
C．involved
D．to involve
答案：C
C [be involved in “从事，忙于”，是固定短语。]