(토플) Industrial diamonds (_______) hard materials. 1) are used to cut 2) are used to be cutting 3) used to be cut 4) are used to cutting
(수능) When the soldier ( ) the flag was wounded, others would replace his position.
1) carried
2) was carrying
3) carrying
4) would carry
(수능) He ( ) sick since last Sunday.
1) is
2) was
3) has been
4) have been
