28. The mistakes children make in learning to speak tell linguists more about how they learn language than the correct forms they use. (A) how they learn language than (B) how one learns language than (C) how children learn language than do (D) learning language than (E) their language learning than do
选c do什么用法
29. Building 1arge new hospitals in the bistate area would constitute a wasteful use of resources, on the basis of avoidance of duplicated facilities alone. (A)on the basis of avoidance of duplicated facilities alone (B)on the grot1nds of avoiding duplicated facilities alone (C)solely in that duplicated facilities should be avoided (D)whi1e the duplication of facilities should be avoided (E)if on1y because the duplication of facilities should be avoided 选e 句子读不顺