三、用所给动词的适当形式填空
1．It is brave of you ____________ (save) the drowning boy.
2．At the age of 17, he ____________ (set) sail for America.
3．He found jewels, gold and the ____________ (preserve) bodies of dead kings.
4．He as well as I __________ (be) to blame.
5．All my years of training ______________ (pay off).
6．Its makers spent much money ____________ (build) the ship.
7．It was 3 years since we ____________ (part).
8．The book you ____________ (refer) to the other day is well worth reading.
9．Every means ____________ (try) to solve the problem.
10．It was the second time that she ____________ (see) her grandfather.
