A. If Mike could B. Were Mike able to C. Would Mike be able to D. If Mike had been able to
单项选择题I really appreciate （） to help me, but I am sure that I will be able to manage by myself.
A. you to offer B. your offering C. that you offer D. that you are offering
单项选择题He is said to （） two trips to China in the last two years.
A. make B. be making C. have been making D. have made
