______ you do the experiment carefully, you would make discoveries others wouldn’t make.
| A．Should | B．Would | C．Could | D．Might |
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 |
What ________ did the doctor write you?
| A．prescription | B．instruction | C．description | D．information |
My mother always gets a bit ________ if we don't arrive when we say we will.
| A．anxious | B．ashamed | C．weak | D．patient |