__________ some coins ,I think there are only 10 dollars left in my pocket.
You should be of your behaviour.
The government has set up a working party to look into the problem of drug ________.
It's high time that we students ______ even harder at our lessons as the national entrance examination is coming nearer.
I haven’t seen ________Maggie since I came here.
I tried phoning her office,but I couldn’t ________.