Though they’ve lived under the same roof for many years, they don’t know each other.[答案]:尽管他们生活在同一屋檐下,但是他们互相并不了解。完型填空A、lthough international travel is usually an (1 )and pleasant experience, travellers should take steps to ensure that their health does not suffer either (2) their time (2)the air or (2) their time abroad.B、efore you go,C、heck with your doctor or local travel clinic (3)injections are necessary for the areas you are travelling (4) . Allow sufficient time to have these injections before you (5)because they may take time to become effective. Be sure that the information on health is up-to-date. Check on the Internet if you are not sure.D、late the day (6) you fly.