They had learned six new lessons ___ the end of last week

How could you ________ your friend so easily?— She is the kind of person who ________ in a crowd. [ ]

The funny boy _______ his pockets _______ sand.

Chinese culture stands for the culture in the east. It is different from that in the ______.

In all his life, Dickens wrote a large number of excellent novels in the 19th century, _____ some are still popular nowadays.