—Send me an email when you are free, will you?
—________.
A．I must B．I will C．I can D．I should
Many students are ________ chatting online, which wastes them plenty of time.
A．crazy about B．connected with C．worried about D．anxious about
The crowd ________ eastward, believing that they can find gold there.
A．are headed B．is headed C．heads D．are heading
Jack became seriously ill after ________ in polluted air for many years.
A．breathed B．breath C．breathing D．to breathe
The new secretary is supposed to report to the manager as soon as she ________.
A．will arrive B．arrives C．is arriving D．is going to arrive
She ________ down beside me and soon fell a deep sleep.
A．lay B．lied C．laid D．lain
