It was in the lab______ was taken charge of by Professor Zhang ____ they did the experiment.
Not only ____ strict with us, but also ____ for us.
“Dear, if you listen to me, you ______ have some candies as a reward,” the woman told her little son.
--- When will your father be back home? --- ____ twelve o’clock.
. His advice made me happy, but ____.
Equipped with modern facilities, today’s libraries differ greatly from ____.