You are working too hard. You'd better keep a ________ between work and relaxation.

I bought a dress for only 10 dollars in a sale; it was a real______.

—Can you help me with this problem?—It's beyond my __________.I didn't work it out, either.

The lady in red immediately became the _____ of attention when she entered the hall. 

 ---- Why don’t you try to do exercise to lose weight? ---- I have tried everything but it has made no _____________.