( )you have worked out the first problem,you may go on to work on the second( )you have worked out the first problem,you may go on to work on the secondA.even if B.unless C.now that Dthough

问题描述:

( )you have worked out the first problem,you may go on to work on the second
( )you have worked out the first problem,you may go on to work on the second
A.even if B.unless C.now that Dthough