—Did Jack come back early last night?—Yes, It was not yet eight o’clock _____ he arrived home.
Even on a cold day he prefers ______ out to play football ______at home.
It was in the lab______ was taken charge of by Professor Zhang ____ they did the experiment.
—The railway station,please.I have to be there in ten minutes. —______,but I’ll do my best.
—Is it for two months ______ they have stayed here? —No,it is only three weeks ______they arrived here.
—I really appreciate______ time to relax. —I don’t doubt ______ able to do so.