Since it is too late to change my mind now, I am（ ）to carrying out the plan.
Before the first non-stop flight made in 1949, it（ ）necessary for all planes to land for refueling.
She has always（ ）her neighbors for the past twenty years.
Your improper words will give（ ）to doubts concerning your true intentions.
Directions: you heard that the son of your close friend, Jim, was idling his time in the university and leading a luxurious. Write a letter to him presenting your opinion and suggestions.Write your letter with no less than 100 words on the ANSWER SHEET. Do not sign your own name at the end of the letter; use "Wu Hua” instead. You do not need to write the address.
It is difficult to tell whether a man is angry or not by（ ）looking at his face.