单句语法填空

1．In the cartoon (卡通), the wolf can live in harmony with the sheep, which makes the children                   (puzzle)．

2．To explain the                 (puzzle) findings, he offers two theories.

3．They help the body defend itself                 some kinds of infections.

4．Some people may defend themselves                saying that snake meat is nutritious.

5．A good book could absorb our attention so completely that for the time being we forget our                 (surround)．

6．But now an American scientist had produced the evidence                 (prove) that we're not all going mad.

7．It has now become                 (evidence) to us that a mistake has been made.