16 Bryan could not __________on his studies because of the noise outside.
(A)condense
(B)confuse
(C)contract
(D)concentrate
答案:登入後查看
統計: A(160), B(393), C(389), D(1450), E(0) #1330092
統計: A(160), B(393), C(389), D(1450), E(0) #1330092