单项选择题
A.50 time the size of B.50 times the size of C.50 times as size as D.50 times as that of
A.Invite professor Green to her wedding. B.Decline the present Professor Green’s remarks about her. C.Buy Professor Green a nice present to express her thanks. D.Find a present together with Professor Green.
A.One night. B.Two nights. C.A week. D.Two weeks.