—It was 3 o'clock ________ we arrived at the village.

—Oh, it was also at 3 o'clock ________ we arrived at the village.

A. when; when

B. when; that

C. that; that

D. that; when

—I misspelt a word here in the sentence.

—Well, that's ________ you were mistaken.

A. when

B. what

C. where

D. why

I don't doubt ________ he will come.

A. that

B. if

C. what

D. whether

It is not clear ________ he did it.

A. who

B. which

C. whom

D. why

________ you've all had a wonderful vacation.

A. It would be good that

B. It is good that

C. It was good that

D. It will be good that

The reason ________ she gave for not being present was ________ the heavy snow prevented her coming.

A. /; because

B. why; because

C. /; that

D. why; whether

What a pity ________ is ________ you didn't arrive by daylight.

A. there; because

B. it; that

C. he; when

D. that; for

It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.

A. that

B. when

C. what

D. how

Is this museum ________ some foreign tourists visited the day before?

A. which.

B. that

C. where

D. the one

________ is known to everybody that the moon travels round the earth once every month.

A. It

B. As

C. That

D. What