He _______ have completed his work；otherwise, he wouldn’t be enjoying himself by the seaside.

There was something wrong with the line. We couldn’t ______ each other clearly.

In English my sister does speaking than writing.

your foreign teacher speaks Chinese fluently!—Oh, she has lived in China for six years, otherwise she _______ such good Chinese.

We shall take the conditions into careful account _______ you have attached to this contract.—Thanks. Hope for further cooperation. [ ]