Memorial Day is a US national holiday ________ to remember those who gave their lives in the service of the nation．

put up

set aside

put on

set up

Taking pictures of snow is ________ Ken has spent much of the past years doing．

that

which

what

how

－Any information about your son?

－No．If only I ________ those tough words to him．

didn’t say

hadn’t said

shouldn’t have said

couldn’t have said

It is written clearly in the requirements that all passengers ________ check onto board thirty minutes before the plane takes off．

may

can

will

shall

In a sports team each player has a clear role, and there are few occasions ________ members are confused or uncertain of their roles．

when

whose

why

which

China’s first Passport Law makes a passport ________ for ten years with no extension．

available

valid

official

effective

No one knows exactly when our ancestors started talking, but new evidence suggests ________ might have happened a long time ago．

which

what

it

they

It was clear Lucy was unhappy．________, it comes as no surprise she has decided to resign．

However

Therefore

Otherwise

Besides

Then they looked forward to ________ just south of the mountain was just a beautiful lake．

see situated at

seeing situating

see situated

seeing situated at

The interview in Boston lasted so long．Had the taxi not speeded up, I would have missed my ________ to New York．

access

approach

connection

attachment