At first ______, the bag seems made of real leather. But actually it is just an imitation.　 

The system has been designed to give students quick and easy ______ to the digital resources of the library. 

Look! Serveal __ are watching a group of ___ eating grass on the hill.

We decided not to climb that mountain because it was raining_________.

—I want to go to the library but I am afraid I am not in the right ________. — _________. Go ahead.