S6

A．Walk around the apartment for dangerous signs.
B．Check the water and electricity to see if they are working.
C．Make sure there are good locks on all the windows and doors.
D．Talk to other people who rent apartments in the same building.

A．The advanced equipment in the laboratory.
B．The so-early start-working hour.
C．The terrible working habit of his colleagues.
D．The interval between the start-working hours of two places.