During the Great Depression he got ______ drug after he lost his job. Thanks to his mother, he decided _____ quitting at last
| A．into; to | B．into; against | C．into; on | D．for; into |
Leave your key with a neighbor _______ you lock yourself out one day.
| A．ever since | B．even if | C．soon after | D．in case |
Small sailboats can easily turn over in the water ______ they are not managed carefully.
| A．though | B．before | C．until | D．if |
Most birds find it safe to sleep in the trees, but ________they have eggs or young chicks, they don’t use a nest.
| A．why | B．how | C．unless | D．where |
You will be successful in the interviewyou have confidence.
| A．before | B．once | C．until | D．though |
I won’t call you, ________ something unexpected happens.
| A．because | B．whether | C．unless | D．while |