This is ______ difficult problem that few students can work it out.
Bob is determined to get a seat for the concert ______ it means standing in line all night for the ticket.
Bamboo, which is a common plant in the south, is used ______ in buildings, food, furniture and so on. It is used to make clothes as well.
Before Chinese Chang’e-2, the US sent up a space probe (探测器) to hit the moon to see ______.
Not only spring but autumn is ______ good time for Wenzhounese to experience ______ nature, especially when sweet osmanthus (桂树) in full blossom.
After graduation from college, he began to wander from city to city, ______ a suitable job.