The period ____dance classes increases gradually from two or three hours a day to five or six.
Both men have been _______to life imprisonment because of robbery.
I began to feel ______ in the new school when I saw some familiar faces.
Chinese Premier Li Keqiang paid ______ official visit to Russia, with ______ series of deals ranging from energy to people-to-people exchanges expected to be signed.
-----I’d like a wake-up call at 7:a.m.,please! ----- OK, _____.
I won’t tell the student the answer to the math problem until heon it for more than an hour.