If he doesn’t go to the cinema tomorrow, ______. [ ]

When did Hong Kong return to our motherland? — ____ 1997. [ ]

Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ______ we should deal with properly.

My mother ____me to read for 30 minutes every morning.

Frank，you look worried．Anything wrong?一Well，I______a test and I”m waiting for the result．