—When would it be __________ for you to go to the science museum with me?—I am free this Friday afternoon. Let's meet at 2 pm at the school gate.
After gunshots fired on campus, there is a growing _________ about safety among teachers and students.
Not until he retired from teaching three years ago ________ having a holiday abroad.
-What are you going to do next weekend? -_______-,if time permits ,I may go to Beijing with my friends.
In order to _______ a good knowledge of English ,he give up his job and went to study in an English school.
________, the boys were shouting and singing.