She is the most _____ one of my friends; you can just depend on her.  

—Excuse me, where is Johnson?—He cannot go home, as his book is lying __________on his desk. 

Some plants are vey ____ to light; they prefer the shade.

Thanks to our ___ schedule, we got our task accomplished ahead of time．

----How about your trip to Hainan?----It couldn’t have been _____. Sometimes I went swimming in the sea; sometimes I lay on the sand.