Rewrite the following sentences by using the word in the (..)that best combines each pair of sentences

----- Nội dung dịch tự động từ ảnh -----
Rewrite the following sentences by using the word in the (..) that best combines each pair of sentences.

347. If you eat an apple a day, you will stay healthy.

348. A teenager will run out of money if he doesn't stop wasting it.

49. James will not pass the test unless he studies harder.

50. My brother won't go traveling this summer if he doesn't stay healthy.