We are confident that the environment ________ by ourfurther efforts to reduce pollution

Has Mr Lee arrived?— No.But it’s already 9 o’clock.He should________at any time. [ ]

Can you hand in your composition tomorrow? — Sure. _____ it handed in on time, I’ll stay up tonight. [ ]

When to go for the on-salary holiday yet?

She ___________ a new idea for improving our English.