Once you _____ the knack of it, you will have no further difficulty.A.shall haveB.had h

If you feel a shortage of energy, join our Health Club. Fatigue is common for people to 1）_________ of to their doctors. In such cases, you should take a look at the causes for your tiredness and learn how you can get rid of it. Firstly, if you have to work hard 24 hours a day, seven days a week with high 2)_________, you will feel tired and bored. The 24/7 push to be productive can wear you out both physically and 3)__________. Your can have mini-breaks that will cheer you up and make your routine a little less routine. Secondly, if you sit staring at a screen for long periods of time you tend to blink less frequently and 4)_______your eyes. Your eyes need a break. Stand up once in a while to 5)_________ your legs and arms. Frequent breaks with long 6)__________ to your nearby parks will keep your body active and reduce eyestrain. Finally, gaining as little as five pounds of weight can cause 7)________. Extra weight also puts extra burden on your heart, which makes you tired. You can 8)_________ the habit of eating junk food and 9)___________ yourself to the basics of healthy eating. Try to eat smaller 10)_________ of food. With each pound of weight you lose, you'll feel a rise in energy. A) reverse B) strip C) strain D) empty E) portions F) fatigue G) rides H) emotionally I) reserve J) stretch K) dump L) complain M) collections N) efficiency O) strides

A.see you only once in a green moon

B.see you only once in a blue moon

C.see you only once in a silver moon

D.see you only once in a brown moon

Once you choose a career you should be stuck in it forever.()

Once you have finished the design, you may have a whole week.

A.off

B.down

C.in D.up

You can confirm your travel arrangements to the United Kingdom once you received your().

Do you need ______ at once？

A、to go

B、go

C、going

D、goes

Once you get into a bad habit, you’ll find it hard toget out of it. (英译汉)

A.if

B. until

C. unless

D. once

They will ______ you everything you need once you start your scientific research.

A) supply B) provide C) take D) offer