Tom likes playing the violin and is good at English.______his sister.

I am trying my best to learn English, but it doesn’t work well! —Don’t worry! Regard it _____ a big challenge! [ ]

It is reported that China has created the first man-made sun in the world recently, ______ ?

My daughter wants a rabbit for long, but I have no time to buy__for her.

Excuse ______. Is this ______ book?—Yes, thanks.