The better use you can make _____ time, the greater contributions you will make _____ society.
I’m stuck on this problem;you may askknows better than I.
—What’s that building? —the medical equipment is stored.
I knowhe said so at the meeting is true.
—Do you think that man will come to your help? —I really don’t knowa person like him can help me with.
I must think of a proper gift for my mother,won’t be expensive but will make her happy.