The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Tom , you ______ leave all your clothes on the floor like this!
They stayed with me for three weeks ,______ they drank all the wine I had.
It is reported that many a new house ______ at present in the disaster area.
------ I don’t think he is fit for the job, ______?------Why do you think so ?
______ is of great importance now , my teacher often reminds me ,is study.