Mary had to call a taxi because the box was_______ to carry all the way home.

—How did you sleep last night?  —Like a log. Never slept ____. 

—Do you think an advertisement is a help when you look for a job?—Well，it depends.________，it gives me a chance to try.

.I hope I will not be called on in class as I’m not yet____prepared．

We must be off _____. It’s eight o’clock already.