已知一个三角形的三条边长为2，x，7，则x的取值范围是______．
依题意得：7-2＜x＜7+2，
即5＜x＜9．
—Ken, why do you look so tired?
—I _____ myself _____ the climate since I came here.
A．hadn’t adapted; to
B．haven’t adapted; to
C．don’t adapt; from
D．didn’t adapt; from
