Students must be strict _________ theirstudies and teachers should be strict ________ their students.

187. Yesterday we had a long meetingwhichfour hours.

“Stopthief! Stop thief!” But the thief wand we lost sightof it.

— What’s that noise?— Oh, I forgot to tell you. The new machine ______.[ ]

is no _____ that the Chinese peoplewill present to the world a successful, splendid and unforgettable exposition.