— Have you seen Shirley since she moved away? — Yes. I’ve seen her several times. She comes back to visit us ______.
— Have you seen Shirley since she moved away?
— Yes. I’ve seen her several times. She comes back to visit us ______.
Mr Li who is in _____ charge of our class is very experienced.
He is a man of ____ and he had a lot of interesting ____ in his life.
I don’t think _____ possible to master a foreign language without much memory work and practice.
Work hard at your lessons, ______ you’ll fail the exams again.
He devoted all the time _____ his research .