It was in the lab______ was taken charge of by Professor Zhang ____ they did the experiment．
A．where, that B．which, where C．that, where D．which, that
—The railway station,please．I have to be there in ten minutes．
—______,but I’ll do my best．
A．No problem B．OK C．I can’t promise D．I can’t do that
—Is it for two months ______ they have stayed here?
—No,it is only three weeks ______they arrived here．
A．that;since B．that;when C．when;that D．since;before
—I really appreciate______ time to relax．
—I don’t doubt ______ able to do so．
A．to have;you to be B．having;that you being
C．to have;you are D．having;that you are
When I was at college I ______ three foreign languages, but I ______ all except a few words of each．
A．spoke; had forgotten B．spoke; have forgotten
C．had spoken; had forgotten D．had spoken; have forgotten
—Would you mind giving your advice on how to improve our business management?
—If you make ______ most of the equipment, there will be ______ rise in production．
A．不填；不填 B．the；a C．不填；a D．the；不填
