Does your son often have a good time ________ Friday night—No. My husband often makes him ________ a lot of homework.

Only by increasing the number of doctors by 50 percent _______ properly in this hospital

_______ expensive mobile phone it is！—Yes, but I think _______ style is quite fashionable.

The designer asked _______ we were getting on well withthe project

She is _____ newcomer to _____chemistry but she hasalready made some important discoveries.