18. The project may be difficult; we must, ____, try our best to get it done in time.(A)although(B)

問題詳情

18. The project may be difficult; we must, ____, try our best to get it done in time.
(A)although
(B) but
(C) otherwise
(D) however

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)