The door is open but nobody is in. Mary______...

The door is open but nobody is in. Mary______have forgotten to lock the door.

A. should　　　　 　　 B. must

C. would　　　　 　　 　 D. could

高三英语单项填空中等难度题查看答案及解析

The door is open but nobody is in. Mary______have forgotten to lock the door.

A. should　　　　 B. must　　　　 C. would　　　　　 D. could

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I called at _____ several times this morning, but nobody answered the door, where

would she have gone?

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The key you have just got ____ the front door.

高三英语单项填空中等难度题查看答案及解析

I saw Mary ____ the house.

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It is not as simple as opening the door and hitting the track in winter. There are a few things you can do to ensure you are getting the most out of your run, and, importantly, not doing more harm than good.

Warm up, cool down

1.Your muscles need some time to warm up when it’s cold, so take it easy when you set off and do a few stretches (伸展) once you're finished.

Drink water

You might not feel hot, but that's because sweat evaporates (蒸发) more quickly into the chilly, dry air. So be sure to drink water before, during and after cold-weather workouts.2.A belt bottle conveniently attaches to your waist so you don't have to carry it and can have a drink whenever you feel like it.

3.

Running in cotton is a bad idea. Wear thin, breathable layers of synthetic ( 合成的)clothing that help protect you from the wind and snow, but still let out heat and moisture (水分) .Thirty percent of your body heat escapes through your hands and forty percent through your head. Wear a hat, or beanie (无边小便帽) ,and gloves so your circulatory system can distribute warm blood to the rest of your body.4.

Run into the wind

5.Obviously, it will be an easier passage home with some extra help from Mother Nature. But, more importantly, you won't have the wind in your face for the second half of your run, when you are more likely to be sweating and catch a chill.

A. Dress right.

B. Keep warm.

C. Don't go too fast, too soon.

D. Start and finish in the same way.

E. Don't wait to drink water until you feel thirsty.

F. Head out into the wind and come home with it at your back.

G. On really cold days, wear a mask or scarf over your mouth to protect your face.

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The laptops made by our company sell best, but nobody could have guessed the place in the market that they ________ 20 years ago.

A. had had B. had C. were having D. were to have

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. Nobody but Jane _____ the secret.

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David knocked at the door for nearly half an hour______Mary opened it, unwilling.

A. when         B. while           C. until    D. before

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----Mary broke up with me!

----You ______ have forgotten about the Valentine's Day．

A．shouldn't          B．couldn't           C．needn't           D．mustn't

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