It was only when I reread his poems recently________I began to appreciate their beauty.

1I telephoned Jane just now,but she wasn’t in. I has to leave her a(n) _______.

Now more and more people are trying _____ using plastic bags, wooden chopsticks and napkins to protect the environment.

The staff of the company are generallyconsidered to have the excellent conditions and their children _____ a bettereducatin .

Our class has already collected much____ on how to save energy so far.