连词成句。

1. a, or, we, car, have,a, didn't, telephone (.)

2. Beijing, I, in, last, lived, year (.)

3. did, you, weeks, what, do, three, ago (?)

4. very, miss, my, much, I, mother (.)

5. read, write, Mary, or, can, not (.)

沃尔玛天天低价的经营理念主要是因为其实施了（）竞争战略。

A.成本领先战略

B.差异化战略

C.目标集聚战略

D.竞争导向战略