Hi, Mary. Could you lend ______ your pen?— Sorry, I’m using it.

_______ the necklace borrowed from her friends made her_____ completely.

If it tomorrow, I will do some sightseeing with my parents in the Summer Palace. [ ]

My backpack is made _____ leather, and it’s made _____ Yiwu, Zhejiang.[ ]

If you are weak ____ a subject, ______your teacher for advice can help.