【推荐1】—Some Chinese students find it difficult to understand native speakers when in London.
—Exactly, ______ they’ve learned a lot about grammar and known many words.

A．if only	B．now that
C．even if	D．as if

【推荐2】He is absent today. That’s ______ he is ill.

A．when

B．because

C．why

D．that

【推荐3】______ riding shared bikes（共享单车）is an environmentally friendly way to travel，many of the bikes are thrown everywhere.

A．Although

B．As

C．Unless

D．Until

【推荐1】__________ there is no law stating how you may dress, not all fashions are respectable.

A．Because

B．Since

C．While

D．Unless

【推荐2】______ this approach is effective in losing weight, it is not as beneficial as keeping a balanced diet.

A．Once

B．While

C．Unless

D．Until

【推荐3】______ I’m thousands of miles away from my motherland, home is always ______ my heart is.

A．While; where	B．Despite; the place where
C．Though; at which	D．Although; the place which