He is the first person you can think of to rely on, for he is always willing to ________ whoever is in trouble.
Either she ______ he is fit for the job, but not me.
Most of us found ______ difficult to finish the work in such a short time.
—Do you know where Mary is? —No, I don’t. I ______ her since last Sunday night.
You still go to the gym every day, ______ you?
The boy ______ is standing at the school gate is our monitor.