用所给词或词组的适当形式填空。

day after day, in the voice of, favorite, 

come up with, look like, before long, 

lose heart, ever since then, one day, operate

1．He went into the forest alone to hunt wild animals. He has never been heard of ________.

2．Football has been my ________ sport since ten years ago.

3．When I came into the room, he cried ________ a duck and everyone laughed heartily.

4．As we were wondering what to do, he suddenly ________ an idea.

5．Though he failed once again to pass the GRE test, he never ________.

6．________ he would sit by the doorway in the hope that she would come around.

7．This shopping center ________ by his uncle.

8．We'll be back to play football with you ________.

9．I can't tell you from your brother. You two ________ each other.

10．________ , when I was sitting in the sun reading, I saw him steal into the room.

Han Mei, I would appreciate ______ you could give me some suggestions on GRE test.

A. it whether     B. it if           C. that when          D. that if