It is widely accepted that young babies learn to do things because certain acts lead to ________．

rewards

prizes

awards

results

John, look at the time．________ you play the piano at such a late hour?

Must

Can

May

Need

Tom, you ________ leave all your clothes on the floor like this!

wouldn’t

mustn’t

needn’t

may not

________ in a white uniform, he looks more like a cook than a doctor．

Dressed

To dress

Dressing

Having dressed

Before building a house, you will have to ________ the government’s permission．

get from

follow

receive

ask for

We always keep ________ spare paper, in case we run out it．

too much

a number of

plenty of

a good many

I’m moving to the countryside because the air there is much fresher than ________ in the city．

ones

one

that

those

As you worked late yesterday, you ________ have come this morning．

may not

can’t

mustn’t

needn’t

My sister was against my suggestion while my brother was ________ it．

in favor of

in memory of

in honour of

in search of

I think we can safely ________ that interest rates will go up again soon．

assume

accomplish

attain

assemble