341.in good time(=early)早早地(做完.到达等)
342. for good(=forever)永远地，长期地
343. take…for granted(=assume to be true)把…认为理所当然的.
344.be grateful to sb. for sth. 因…感谢某人
345.on the ground(s)for(=because of) 由 于 …
346.fall to the ground(计划、希望等)失败，落空
347. on one’s guard(against)谨防，警惕;(be)on guard 站岗
348. guard against(=defend，keep safe)警惕，防止;guard…against 警卫…防止
349.guess at 猜，估计
350.by guess 靠 猜
351.be guilty of 犯有…罪或过失
352.be in the habit of 习惯于
353.break off(a habit)改掉(某种习惯)
354.break sb. of(a habit)使某人改掉(某习惯)
355.get(fall)into the habit of 养成了…的习惯
