．Ram explained to his mother ________ he would get home late that night because of extra work.

A．that B．which

C．what D．whether

I think you should work harder ________ you are satisfied with the way things are.

A．if B．when

C．since D．unless

________ is known to all is that effective measures should be taken to deal with the problem of the over?exploitation of our resources.

A．What B．It

C．As D．Which

—When did you get home last night?

—It was almost midnight ________ we arrived home.

A．that B．before

C．since D．when

He met Rachel at her college graduation ceremony in 2011, ________ he was later to marry.

A．which B．when

C．where D．whom

I went to that fancy restaurant with my wife yesterday, ________ chefs are really brilliant.

A．when B．which

C．who D．whose

The Olympics are like a huge stage ________ everyone makes every effort to achieve their dreams.

A．that B．when

C．which D．where

Her son was accused of cheating by the police, ________ made it difficult for her to go to sleep.

A．what B．as

C．which D．where

After a day's exhausting climb we arrived at ________ we had been told was “Garden in the Air”．

A．what B．which

C．that D．where

The old woman is warm?hearted. She is always ready to help ________ is in trouble.

A．no matter who B．whomever

C．whoever D．anyone