— How do you usually come to school , by bus or by bike?— _____ . I walk .

 ________ is known to us all that the sun rises in the east.

There's ______with my bike.I'm sorry I'm late.

—What about asking these new graduates to take on the task?—I m afraid not．While they are energetic and ambitious, _____ of them seems to be suitable for this demanding job．

This book teaches us how to analyze _______is causing the stress in our lift.