When she asked Peter ________ he was out of work again, he nodded his head and said yes.

The number of wild lions in Africa (非洲) _ _ much smaller than before.

It was some time _______ I realized the fact that I had been cheated by the salesman

I will never understand how it ______ that you failedin the examination for you are such a good student.

I some good novels in simple English．