If it________ , I will go to the Central Park with my son this weekend.
He _____ when the UFO arrived.
The teacher said that they ______ hard-working students.
His father _____ to Nanjing. He _____ back next week. A. has been, is B has been, will be C. has gone, is D. has gone, will be
The teacher encourages her students ____ English as much as possible.
I will stay at home and read books if it _______ tomorrow.