As is known to us all, traveling is ________, but we often feel ________ when we are back from travels．

interesting; tired

interested; tiring

interesting; tiring

interested; tired

Make sure you protect ________ areas of your skin when you go out in summer．

steady

sensitive

stable

applied

The science park is also ________ home to a growing number of overseas Chinese who have grasped the opportunity to develop their ideas at ________ home．

/; the

the;/

a;/

/;/

The wind increased so much that they had to ________ their tent．

put on

put up

put off

put out

He ________ have attended the meeting this morning．He has gone to England yesterday．

can't

mustn't

shouldn't

needn't

________ me one more hour and I will be able to finish all the work．

If you give

To give

Give

Giving

Many teens don't get enough sleep because they have ________ homework, ________ makes them stay up at night．

much too; which

too much; that

much too; what

too much; which

I didn't pass the examination last term．Only then ________ the importance of study．

I realized

I had realized

was I realized

did I realize

This machine ________．I need to have it repaired．

doesn't work

isn't working

didn't work

wasn't working

The mother together with her children ________ very hungry and tired．

are

were

is

can be